0.6.1: merge a few patches, create_if_missing for plugins
0.6.1: merge a few patches, create_if_missing for plugins

eklein/jenkins,rkolless/jenkins,Afterglow/jenkins,DanielRedOak/jenkins,ndobson/jenkins,j-c-h-e-n-g/jenkins,juliandunn/jenkins,samdunne/jenkins,SinisterLight/jenkins,ebsco/jenkins,erikthorselius/jenkins,DataDog/jenkins,rexut/opscode-cookbooks-jenkins,juliandunn/jenkins,siteshwar/jenkins,RobertNorthard/jenkins,pierreozoux/jenkins,StephenKing/chef-cookbook-jenkins,ryandub/jenkins,Dispader/jenkins,juliandunn/jenkins,someara/jenkins-cookbook,chef-cookbooks/jenkins,epu/epu-cb-jenkins,chef-cookbooks/jenkins,Tiger66639/jenkins,Sauraus/jenkins,Da-Wei/jenkins,StephenKing/chef-cookbook-jenkins,simplymeasured/opscode-cookbooks-jenkins,krobertson/jenkins-cookbook,blackboard/jenkins,rberger/jenkins,dshvedchenko/jenkins,epu/epu-cb-jenkins,Piousbox-cookbooks/jenkins,bhalothia/jenkins,rexut/opscode-cookbooks-jenkins,alex-slynko-wonga/jenkins,richleland/jenkins,Dispader/jenkins,samdunne/jenkins,gcymbalski/jenkins,timops/jenkins,Piousbox-cookbooks/jenkins,daften/cookbook-jenkins,Tiger66639/jenkins,AmoebaLabs/chef-jenkins,mattjalexander/jenkins,autoclone/jenkins-cookbook,cru-Luis-Rodriguez/jenkins,mknapik/jenkins,streeter/jenkins,dekokun/jenkins,autoclone/jenkins-cookbook,jcuzens/jenkins,crittercism/jenkins,schisamo/jenkins,mlongob/jenkins,irccloud/jenkins,rexut/opscode-cookbooks-jenkins,b-dean/jenkins,Dispader/jenkins,isbaran/jenkins,j-c-h-e-n-g/jenkins,team-lab/chef-jenkins,wanelo-chef/jenkins,duro/jenkins,Sauraus/jenkins,ktc-itsnotbutter/jenkins,rapid7-cookbooks/jenkins,mlongob/jenkins,RSO/jenkins,rapid7-cookbooks/jenkins,ebsco/jenkins,kisoku/jenkins,blt04/chef-jenkins,suchitpuri/jenkins,autoclone/jenkins,opscode-cookbooks/jenkins,bhalothia/jenkins,daften/cookbook-jenkins,mknapik/jenkins,rchekaluk/jenkins,rapid7-cookbooks/jenkins,Sauraus/jenkins,streamlinesocial/jenkins,Tiger66639/jenkins,RobertNorthard/jenkins,rchekaluk/jenkins,bencaron/jenkins,developerinlondon/jenkins,rchekaluk/jenkins,mknapik/jenkins,locke105/jenkins,jbrehm/jenkins,cburyta/jenkins,martinb3-cookbooks/jenkins,gshively11/jenkins,grigarr/jenkins,jaredrussell/jenkins,m1lth14d3s/jenkins,hirocaster/jenkins-1,martinb3-cookbooks/jenkins,umar85/jenkins,autoclone/iptables,asmarre/jenkins,autoclone/jenkins,cru-Luis-Rodriguez/jenkins,bhalothia/jenkins,mlongob/jenkins,developerinlondon/jenkins,RobertNorthard/jenkins,autoclone/iptables,switchgears/jenkins,dshvedchenko/jenkins,ttab/jenkins,gshively11/jenkins,rafaelmagu/jenkins,Youscribe/jenkins-cookbook,opscode-cookbooks/jenkins,epu/epu-cb-jenkins,ebsco/jenkins,martinb3-cookbooks/jenkins,priestjim/jenkins,Piousbox-cookbooks/jenkins,samdunne/jenkins,umar85/jenkins,JeanMertz/jenkins-1,opscode-cookbooks/jenkins,mdlavin/jenkins,daften/cookbook-jenkins,gshively11/jenkins,StephenKing/chef-cookbook-jenkins,b-dean/jenkins,smedefind/jenkins,cru-Luis-Rodriguez/jenkins,developerinlondon/jenkins,uspeak/chef-jenkins,rberrelleza/jenkins,dshvedchenko/jenkins,umar85/jenkins,b-dean/jenkins,autoclone/jenkins-cookbook,chef-cookbooks/jenkins,autoclone/iptables,autoclone/jenkins,kippandrew/jenkins,jhsubscribe/chef-jenkins,thrucker/jenkins,j-c-h-e-n-g/jenkins