Fix bootstrap on clean install
Fix bootstrap on clean install

On a clean Ubuntu 13.04 install, the bootstrap script fails with:
make: apt-add-repository: Command not found
make: *** [docker] Error 127

This happens because 'software-properties-common' needs to be installed.
jamesblunt/dokku,emdantrim/dokku,bewest/dokku-alt,F4-Group/dokku,experimental-platform/dokku,ignlg/dokku,silasb/dokku,cjblomqvist/dokku,frog/dokku,plietar/dokku,musicglue/dokku,pbrumm/dokku,vfulco/dokku-alt,pmvieira/dokku,TribeMedia/dokku,erkki/dokku,mikexstudios/dokku,henrik/dokku,omeid/dokku,tilgovi/dokku,mrluc/dokku,fruitl00p/dokku,mikexstudios/dokku,RsrchBoy/dokku,aydintd/dokku,mvberg/dokku,TribeMedia/dokku,banyan/dokku,tilgovi/dokku,vijayviji/dokku,johnfraney/dokku,suchasurge/dokku,claytonbrown/dokku,christiangenco/dokku,Git-Host/dokku,rocLv/dokku,lmars/dokku,codelation/dokku,dsrowell/dokku-alt,amaltson/dokku,netbrick/dokku-alt,smurthas/dokku,statianzo/dokku,alexquick/dokku,dokku-alt/dokku-alt,vfulco/dokku-alt,fgrehm/dokku,mouserage/dokku,vijayviji/dokku,eleventigers/dokku,alessio/dokku,aydintd/dokku,dokku-alt/dokku-alt,beni55/dokku,crisward/dokku,kennetham/dokku,jimjag/dokku,3onyc/dokku,dsrowell/dokku-alt,gianpaj/dokku,smurthas/dokku,callahad/dokku,TribeMedia/dokku,lonnen/davis-ci,lukas2511/dokku,jimeh/dokku,rocLv/dokku,gdi2290/dokku,u2mejc/dokku,jazzzz/dokku,jimeh/dokku,codelation/dokku,callahad/dokku,alexquick/dokku,Fab-IT-ApS/dokku,ryana/dokku,ddreaml/dokku,christiangenco/dokku,johnfraney/dokku,fkowal/dokku,Fab-IT-ApS/dokku,codeconfab/dokku,jazzzz/dokku,bewest/dokku-alt,fmoliveira/dokku,Cactusbone/dokku,silasb/dokku,hanwoody/dokku,gabrielrios/dokku,progrium/dokku,christiangenco/dokku,arthurschreiber/dokku,vkurup/dokku,mmerickel/dokku,netbrick/dokku-alt,Cactusbone/dokku,ayufan/dokku,bkniffler/dokku,kennetham/dokku,rocLv/dokku,beni55/dokku,erkki/dokku,crisward/dokku,mrluc/dokku,alexquick/dokku,mvberg/dokku,phaza/dokku,ignlg/dokku,beedesk/dokku-alt,vfulco/dokku-alt,mjmeintjes/dokku,u2mejc/dokku,vkurup/dokku,pmvieira/dokku,yuvadm/dokku-base,aegypius/dokku,zimbatm/dokku,crisward/dokku,mikexstudios/dokku,zimbatm/dokku,kennetham/dokku,fkowal/dokku,cjblomqvist/dokku,sseemayer/dokku,stnly/dokku-alt,arsthanea/dokku,tidepool-org/dokku,vlipco/dokku,suxor42/dokku,bkniffler/dokku,codeconfab/dokku,suxor42/dokku,vlipco/dokku,fkowal/dokku,netbrick/dokku,eljojo/dokku,netbrick/dokku-alt,alessio/dokku,lonnen/davis-ci,mouserage/dokku,netbrick/dokku-alt,codelation/dokku,jimeh/dokku,arsthanea/dokku,fruitl00p/dokku,ertrzyiks/dokku,k4ml/dokku,floatdrop/dokku,Cactusbone/dokku,hanwoody/dokku,gdi2290/dokku,cjblomqvist/dokku,expa/dokku,dokku-alt/dokku-alt,elia/dokku,jimjag/dokku,ddreaml/dokku,mmalecki/dokku,ddreaml/dokku,k4ml/dokku,aydintd/dokku,bewest/dokku-alt,aegypius/dokku,henrik/dokku,barseghyanartur/dokku,fmoliveira/dokku,sebastianscatularo/dokku,barseghyanartur/dokku,rocLv/dokku,beedesk/dokku,econya/dokku,AnselZhangGit/dokku,eljojo/dokku,biddyweb/dokku,progrium/dokku,frog/dokku,AnselZhangGit/dokku,musicglue/dokku,beedesk/dokku-alt,davidsiefert/dokku,experimental-platform/dokku,bewest/dokku,Fab-IT-ApS/dokku,tidepool-org/dokku,stnly/dokku-alt,jeffutter/dokku,banyan/dokku,vijayviji/dokku,omeid/dokku,gianpaj/dokku,jimjag/dokku,Git-Host/dokku,RsrchBoy/dokku,yuvadm/dokku-base,F4-Group/dokku,davidsiefert/dokku,eljojo/dokku,bogdal/dokku,arsthanea/dokku,jaseg/dokku,gevans/dokku,jvanbaarsen/dokku,ksokhan/dokku,bobvanderlinden/dokku,matto1990/dokku,kennetham/dokku,bewest/dokku,stnly/dokku-alt,jamesblunt/dokku,vkurup/dokku,jaseg/dokku,beedesk/dokku,vkurup/dokku,stepri/dokku,cococoder/dokku,rajivm/dokku,econya/dokku,econya/dokku,zimbatm/dokku,ddreaml/dokku,matto1990/dokku,expa/dokku,u2mejc/dokku,tilgovi/dokku,vfulco/dokku-alt,u2mejc/dokku,3onyc/dokku,lemmycaution/dokku,expa/dokku,fkowal/dokku,suchasurge/dokku,beedesk/dokku,jazzzz/dokku,mmalecki/dokku,lonnen/davis-ci,claytonbrown/dokku,davidsiefert/dokku,ignlg/dokku,experimental-platform/dokku,phaza/dokku,dokku/dokku,mrluc/dokku,ryana/dokku,elia/dokku,suxor42/dokku,Evlos/dokku,omeid/dokku,lemmycaution/dokku,beedesk/dokku-alt,Kloadut/dokku,rajivm/dokku,elia/dokku,netbrick/dokku-alt,dokku/dokku,ertrzyiks/dokku,gabrielrios/dokku,bobvanderlinden/dokku,u2mejc/dokku,callahad/dokku,bobvanderlinden/dokku,fruitl00p/dokku,Git-Host/dokku,mjmeintjes/dokku,bewest/dokku,barseghyanartur/dokku,eljojo/dokku,jaseg/dokku,stnly/dokku-alt,elia/dokku,crisward/dokku,tilgovi/dokku,ignlg/dokku,jamesmarva/dokku,hbouvier/dokku,ryana/dokku,jimeh/dokku,rocLv/dokku,Git-Host/dokku,aegypius/dokku,omeid/dokku,pmvieira/dokku,vkurup/dokku,Cactusbone/dokku,netbrick/dokku-alt,vlipco/dokku,ertrzyiks/dokku,experimental-platform/dokku,claytonbrown/dokku,floatdrop/dokku,vlipco/dokku,nnnnathann/dokku,alessio/dokku,premist/dokku,banyan/dokku,netbrick/dokku,barseghyanartur/dokku,beedesk/dokku-alt,u2mejc/dokku,TribeMedia/dokku,mjmeintjes/dokku,ddreaml/dokku,lmars/dokku,arthurschreiber/dokku,stnly/dokku-alt,expa/dokku,econya/dokku,AnselZhangGit/dokku,jazzzz/dokku,jimeh/dokku,ertrzyiks/dokku,omeid/dokku,alexquick/dokku,cococoder/dokku,lmars/dokku,henrik/dokku,fgrehm/dokku,premist/dokku,paralin/crew,lonnen/davis-ci,Evlos/dokku,claytonbrown/dokku,beedesk/dokku,tidepool-org/dokku,econya/dokku,alexquick/dokku,plietar/dokku,leonardodino/dokku,hbouvier/dokku,nnnnathann/dokku,christiangenco/dokku,bogdal/dokku,kennetham/dokku,silasb/dokku,aydintd/dokku,beni55/dokku,ertrzyiks/dokku,nnnnathann/dokku,arsthanea/dokku,mrluc/dokku,jvanbaarsen/dokku,callahad/dokku,pmvieira/dokku,klodoo/dokku,barseghyanartur/dokku,beni55/dokku,lgierth/dokku,davidsiefert/dokku,eleventigers/dokku,lukas2511/dokku,leonardodino/dokku,sebastianscatularo/dokku,Evlos/dokku,aydintd/dokku,emdantrim/dokku,mmerickel/dokku,mouserage/dokku,ertrzyiks/dokku,ddreaml/dokku,mouserage/dokku,cococoder/dokku,johnfraney/dokku,erkki/dokku,gevans/dokku,stepri/dokku,ebeigarts/dokku,vkurup/dokku,premist/dokku,pmvieira/dokku,suchasurge/dokku,floatdrop/dokku,bewest/dokku,fgrehm/dokku,premist/dokku,jeffutter/dokku,akatrevorjay/dokku,mvberg/dokku,gabrielrios/dokku,stepri/dokku,akatrevorjay/dokku,gianpaj/dokku,mikexstudios/dokku,fkowal/dokku,eleventigers/dokku,klodoo/dokku,christiangenco/dokku,F4-Group/dokku,jamesmarva/dokku,tidepool-org/dokku,ayufan/dokku,mehulsbhatt/dokku-alt,leonardodino/dokku,mjmeintjes/dokku,tidepool-org/dokku,gabrielrios/dokku,phaza/dokku,aegypius/dokku,progrium/dokku,progrium/dokku,gevans/dokku,gianpaj/dokku,suxor42/dokku,jamesmarva/dokku,rocLv/dokku,frog/dokku,bewest/dokku-alt,Cactusbone/dokku,silasb/dokku,bobvanderlinden/dokku,F4-Group/dokku,elia/dokku,AnselZhangGit/dokku,hbouvier/dokku,leonardodino/dokku,leonardodino/dokku,fgrehm/dokku,banyan/dokku,dsrowell/dokku-alt,ignlg/dokku,ertrzyiks/dokku,eleventigers/dokku,econya/dokku,fruitl00p/dokku,alessio/dokku,jeffutter/dokku,bkniffler/dokku,Cactusbone/dokku,pmvieira/dokku,fmoliveira/dokku,matto1990/dokku,barseghyanartur/dokku,lgierth/dokku,statianzo/dokku,mmerickel/dokku,kennetham/dokku,progrium/dokku,elia/dokku,amaltson/dokku,omeid/dokku,crisward/dokku,amaltson/dokku,cococoder/dokku,Evlos/dokku,tilgovi/dokku,suxor42/dokku,beedesk/dokku-alt,zimbatm/dokku,codeconfab/dokku,leonardodino/dokku,gianpaj/dokku,floatdrop/dokku,alessio/dokku,stepri/dokku,akatrevorjay/dokku,sseemayer/dokku,bobvanderlinden/dokku,leonardodino/dokku,Kloadut/dokku,amaltson/dokku,biddyweb/dokku,plietar/dokku,aydintd/dokku,crisward/dokku,vfulco/dokku-alt,omeid/dokku,Git-Host/dokku,ebeigarts/dokku,johnfraney/dokku,mmalecki/dokku,beni55/dokku,jazzzz/dokku,smurthas/dokku,mrluc/dokku,yuvadm/dokku-base,eleventigers/dokku,henrik/dokku,yuvadm/dokku-base,basicer/dokku,johnfraney/dokku,arthurschreiber/dokku,codeconfab/dokku,ebeigarts/dokku,jamesblunt/dokku,eleventigers/dokku,ignlg/dokku,expa/dokku,stenius/dokku,davidsiefert/dokku,k4ml/dokku,musicglue/dokku,bewest/dokku,3onyc/dokku,beedesk/dokku-alt,callahad/dokku,mouserage/dokku,experimental-platform/dokku,stenius/dokku,alessio/dokku,gdi2290/dokku,jvanbaarsen/dokku,pbrumm/dokku,gdi2290/dokku,floatdrop/dokku,3onyc/dokku,stenius/dokku,ddreaml/dokku,jvanbaarsen/dokku,amaltson/dokku,basicer/dokku,mehulsbhatt/dokku-alt,netbrick/dokku,Fab-IT-ApS/dokku,pmvieira/dokku,vlipco/dokku,dokku-alt/dokku-alt,callahad/dokku,smurthas/dokku,dokku/dokku,elia/dokku,akatrevorjay/dokku,jamesmarva/dokku,mmerickel/dokku,emdantrim/dokku,Fab-IT-ApS/dokku,jamesmarva/dokku,suxor42/dokku,k4ml/dokku,lgierth/dokku,dokku-alt/dokku-alt,zimbatm/dokku,omeid/dokku,mvberg/dokku,rocLv/dokku,eljojo/dokku,ksokhan/dokku,amaltson/dokku,sseemayer/dokku,vijayviji/dokku,beni55/dokku,beni55/dokku,ryana/dokku,gdi2290/dokku,nnnnathann/dokku,bewest/dokku-alt,lukas2511/dokku,dsrowell/dokku-alt,expa/dokku,mvberg/dokku,jimeh/dokku,stenius/dokku,lemmycaution/dokku,vijayviji/dokku,emdantrim/dokku,lemmycaution/dokku,bobvanderlinden/dokku,fruitl00p/dokku,mmalecki/dokku,frog/dokku,mehulsbhatt/dokku-alt,beedesk/dokku,ignlg/dokku,hanwoody/dokku,Git-Host/dokku,basicer/dokku,frog/dokku,mlebkowski/dokku,mmalecki/dokku,bobvanderlinden/dokku,hbouvier/dokku,fmoliveira/dokku,johnfraney/dokku,fmoliveira/dokku,alexquick/dokku,sebastianscatularo/dokku,erkki/dokku,3onyc/dokku,netbrick/dokku-alt,vkurup/dokku,bogdal/dokku,pbrumm/dokku,sebastianscatularo/dokku,Kloadut/dokku,bkniffler/dokku,3onyc/dokku,mikexstudios/dokku,gabrielrios/dokku,arsthanea/dokku,Cactusbone/dokku,progrium/dokku,vlipco/dokku,basicer/dokku,plietar/dokku,jamesmarva/dokku,arsthanea/dokku,henrik/dokku,codelation/dokku,amaltson/dokku,mvberg/dokku,gianpaj/dokku,alexquick/dokku,phaza/dokku,henrik/dokku,u2mejc/dokku,fruitl00p/dokku,ayufan/dokku,mlebkowski/dokku,jazzzz/dokku,biddyweb/dokku,suchasurge/dokku,dsrowell/dokku-alt,mrluc/dokku,fgrehm/dokku,lmars/dokku,stenius/dokku,arthurschreiber/dokku,beedesk/dokku,hbouvier/dokku,lemmycaution/dokku,arthurschreiber/dokku,basicer/dokku,mlebkowski/dokku,F4-Group/dokku,bogdal/dokku,suchasurge/dokku,jamesblunt/dokku,emdantrim/dokku,plietar/dokku,stnly/dokku-alt,mehulsbhatt/dokku-alt,RsrchBoy/dokku,dsrowell/dokku-alt,stepri/dokku,erkki/dokku,biddyweb/dokku,crisward/dokku,cjblomqvist/dokku,gdi2290/dokku,k4ml/dokku,eljojo/dokku,bewest/dokku,silasb/dokku,lgierth/dokku,banyan/dokku,beedesk/dokku-alt,mehulsbhatt/dokku-alt,pmvieira/dokku,Kloadut/dokku,Git-Host/dokku,lgierth/dokku,ebeigarts/dokku,vlipco/dokku,phaza/dokku,mrluc/dokku,lonnen/davis-ci,banyan/dokku,gdi2290/dokku,codeconfab/dokku,stnly/dokku-alt,sebastianscatularo/dokku,Fab-IT-ApS/dokku,akatrevorjay/dokku,cococoder/dokku,dsrowell/dokku-alt,jimjag/dokku,rocLv/dokku,mmerickel/dokku,fkowal/dokku,davidsiefert/dokku,vijayviji/dokku,hanwoody/dokku,gianpaj/dokku,experimental-platform/dokku,claytonbrown/dokku,zimbatm/dokku,jamesblunt/dokku,jaseg/dokku,gevans/dokku,barseghyanartur/dokku,sebastianscatularo/dokku,ksokhan/dokku,matto1990/dokku,dokku-alt/dokku-alt,alessio/dokku,emdantrim/dokku,jamesmarva/dokku,mjmeintjes/dokku,sebastianscatularo/dokku,Evlos/dokku,mehulsbhatt/dokku-alt,expa/dokku,akatrevorjay/dokku,bkniffler/dokku,bewest/dokku-alt,ksokhan/dokku,cjblomqvist/dokku,gabrielrios/dokku,lukas2511/dokku,netbrick/dokku,netbrick/dokku,dokku/dokku,davidsiefert/dokku,crisward/dokku,kennetham/dokku,klodoo/dokku,arthurschreiber/dokku,Kloadut/dokku,lmars/dokku,callahad/dokku,jaseg/dokku,hbouvier/dokku,hanwoody/dokku,emdantrim/dokku,fkowal/dokku,kennetham/dokku,hanwoody/dokku,banyan/dokku,experimental-platform/dokku,jvanbaarsen/dokku,gianpaj/dokku,jamesblunt/dokku,aegypius/dokku,codeconfab/dokku,lukas2511/dokku,nnnnathann/dokku,tilgovi/dokku,fgrehm/dokku,arsthanea/dokku,basicer/dokku,mehulsbhatt/dokku-alt,yuvadm/dokku-base,progrium/dokku,musicglue/dokku,eljojo/dokku,RsrchBoy/dokku,nnnnathann/dokku,bkniffler/dokku,Evlos/dokku,ksokhan/dokku,mlebkowski/dokku,frog/dokku,AnselZhangGit/dokku,jvanbaarsen/dokku,silasb/dokku,rajivm/dokku,stenius/dokku,ksokhan/dokku,tilgovi/dokku,codeconfab/dokku,arsthanea/dokku,vijayviji/dokku,k4ml/dokku,AnselZhangGit/dokku,paralin/crew,davidsiefert/dokku,emdantrim/dokku,hanwoody/dokku,jeffutter/dokku,akatrevorjay/dokku,bewest/dokku,arthurschreiber/dokku,Evlos/dokku,jimjag/dokku,cjblomqvist/dokku,yuvadm/dokku-base,eleventigers/dokku,F4-Group/dokku,jimjag/dokku,fmoliveira/dokku,Evlos/dokku,mikexstudios/dokku,ebeigarts/dokku,phaza/dokku,ebeigarts/dokku,klodoo/dokku,eljojo/dokku,christiangenco/dokku,ertrzyiks/dokku,netbrick/dokku,mouserage/dokku,Fab-IT-ApS/dokku,mjmeintjes/dokku,elia/dokku,bkniffler/dokku,pbrumm/dokku,rajivm/dokku,klodoo/dokku,musicglue/dokku,matto1990/dokku,claytonbrown/dokku,floatdrop/dokku,Git-Host/dokku,sseemayer/dokku,biddyweb/dokku,fruitl00p/dokku,premist/dokku,RsrchBoy/dokku,leonardodino/dokku,jimeh/dokku,lukas2511/dokku,beni55/dokku,TribeMedia/dokku,henrik/dokku,dokku/dokku,mmerickel/dokku,matto1990/dokku,netbrick/dokku-alt,3onyc/dokku,cjblomqvist/dokku,lgierth/dokku,frog/dokku,cococoder/dokku,mvberg/dokku,stnly/dokku-alt,premist/dokku,mmerickel/dokku,statianzo/dokku,stepri/dokku,vfulco/dokku-alt,basicer/dokku,Kloadut/dokku,stepri/dokku,bogdal/dokku,tilgovi/dokku,johnfraney/dokku,basicer/dokku,rajivm/dokku,alexquick/dokku,pbrumm/dokku,bewest/dokku-alt,jaseg/dokku,ayufan/dokku,experimental-platform/dokku,jvanbaarsen/dokku,mmerickel/dokku,vijayviji/dokku,jeffutter/dokku,mmalecki/dokku,ayufan/dokku,arthurschreiber/dokku,sseemayer/dokku,expa/dokku,lmars/dokku,cjblomqvist/dokku,claytonbrown/dokku,dokku-alt/dokku-alt,matto1990/dokku,sseemayer/dokku,bobvanderlinden/dokku,hbouvier/dokku,dsrowell/dokku-alt,lmars/dokku,ryana/dokku,gabrielrios/dokku,matto1990/dokku,rajivm/dokku,klodoo/dokku,sebastianscatularo/dokku,sseemayer/dokku,ebeigarts/dokku,Fab-IT-ApS/dokku,mikexstudios/dokku,mehulsbhatt/dokku-alt,u2mejc/dokku,jamesmarva/dokku,mouserage/dokku,mlebkowski/dokku,dokku/dokku,sseemayer/dokku,jimeh/dokku,mrluc/dokku,jimjag/dokku,lmars/dokku,jeffutter/dokku,bogdal/dokku,F4-Group/dokku,mjmeintjes/dokku,beedesk/dokku,ryana/dokku,fmoliveira/dokku,henrik/dokku,callahad/dokku,fruitl00p/dokku,dokku-alt/dokku-alt,ksokhan/dokku,smurthas/dokku,Cactusbone/dokku,3onyc/dokku,lemmycaution/dokku,vkurup/dokku,alessio/dokku,mlebkowski/dokku,ayufan/dokku,vlipco/dokku,amaltson/dokku,tidepool-org/dokku,statianzo/dokku,netbrick/dokku,jazzzz/dokku,aegypius/dokku,AnselZhangGit/dokku,RsrchBoy/dokku,ebeigarts/dokku,econya/dokku,progrium/dokku,suxor42/dokku,TribeMedia/dokku,biddyweb/dokku,ddreaml/dokku,fmoliveira/dokku,stenius/dokku,akatrevorjay/dokku,johnfraney/dokku,claytonbrown/dokku,jazzzz/dokku,AnselZhangGit/dokku,codelation/dokku,yuvadm/dokku-base,barseghyanartur/dokku,gabrielrios/dokku,lonnen/davis-ci,musicglue/dokku,F4-Group/dokku,TribeMedia/dokku,biddyweb/dokku,klodoo/dokku,plietar/dokku,biddyweb/dokku,dokku/dokku,erkki/dokku,mlebkowski/dokku,beedesk/dokku,gevans/dokku,pbrumm/dokku,vfulco/dokku-alt,dokku/dokku,statianzo/dokku,aydintd/dokku,beedesk/dokku-alt,bkniffler/dokku,lemmycaution/dokku,zimbatm/dokku,netbrick/dokku,bewest/dokku-alt,statianzo/dokku,mouserage/dokku,vfulco/dokku-alt,suxor42/dokku,nnnnathann/dokku,codelation/dokku,klodoo/dokku,bogdal/dokku,suchasurge/dokku,TribeMedia/dokku,jamesblunt/dokku,RsrchBoy/dokku,jimjag/dokku,hanwoody/dokku,stepri/dokku,codeconfab/dokku,silasb/dokku,plietar/dokku,lonnen/davis-ci,econya/dokku,smurthas/dokku,gevans/dokku,ayufan/dokku,ryana/dokku