added -s (install from source) option.
added -s (install from source) option.

PeterDaveHello/nvm,dfackler/nvm,kumaria/nvm,greyhwndz/nvm,SampleLiao/nvm,LeeLovCY/nvm,kumaria/nvm,lukechilds/nvm,devedbox/nvm,psychoss/nvm,LeeLovCY/nvm,bevacqua/nvm,modulexcite/nvm,kmctown/nvm,devedbox/nvm,Kuzirashi/nvm,joneit/nvm,nontage24/nvm,tlevine/nvm,chinazhaghai/nvm,jaawerth/nvm,NicCollins/nvm,CristianCantoro/nvm,sjfkai/nvm,reybango/nvm,cirosantilli/nvm,domenicosolazzo/nvm,PeterDaveHello/nvm,misterdjules/nvm,Ingelheim/nvm,cnpm/nvm,christophercaburog/nvm,edwmurph/nvm,williamboman/nvm,tlevine/nvm,ljharb/nvm,diegofcb10/nvm,Richardphp/nvm,wahyutaufik/nvm,dfackler/nvm,jbergstroem/nvm,gtdeng/nvm,michael-ni/nvm,mmorejon/nvm,slariviere/nvm,thomasf/nvm,vinaykaradia/clone-nvm,jhliberty/nvm,JanChw/nvm,Kuzirashi/nvm,appleboy/nvm,bevacqua/nvm,parasaro92/nvm,owen-it/nvm,DigitallySeamless/nvm,williamboman/nvm,bbuck/nvm,JasonChrYoung/nvm,edwmurph/nvm,hanhailong/nvm,hanhailong/nvm,xtuple/nvm,joneit/nvm,bbuck/nvm,jaawerth/nvm,IonicaBizauKitchen/nvm,cjac/nvm,tianzhihen/nvm,misterdjules/nvm,mirydz/nvm,vinaykaradia/clone-nvm,parasaro92/nvm,JasonChrYoung/nvm,cjac/nvm,nontage24/nvm,elrasguno/nvm,gtdeng/nvm,pmq20/nvm,Richardphp/nvm,Salahudeen/nvm,pmq20/nvm,woss/nvm,thomasf/nvm,cnpm/nvm,icyflame/nvm,woss/nvm,evocateur/nvm,elrasguno/nvm,CristianCantoro/nvm,egilkh/nvm,icyflame/nvm,hkdobrev/nvm,SampleLiao/nvm,PeterDaveHelloKitchen/nvm,psychoss/nvm,IonicaBizauKitchen/nvm,diegofcb10/nvm,michael-ni/nvm,fnogatz/swivm,modulexcite/nvm,youleiy/nvm,chinazhaghai/nvm,wahyutaufik/nvm,creationix/nvm,egilkh/nvm,tianzhihen/nvm,scq000/nvm,ljharb/nvm,Theodeus/nvm,Ingelheim/nvm,jbergstroem/nvm,mmorejon/nvm,WY08271/nvm,evocateur/nvm,owen-it/nvm,kmctown/nvm,christophercaburog/nvm,youleiy/nvm,cirosantilli/nvm,greyhwndz/nvm,slariviere/nvm,PeterDaveHelloKitchen/nvm,reybango/nvm,scq000/nvm,wskplho/nvm,mirydz/nvm,domenicosolazzo/nvm,creationix/nvm,Salahudeen/nvm,hkdobrev/nvm,WY08271/nvm,JanChw/nvm,wskplho/nvm,lukechilds/nvm,DigitallySeamless/nvm,Theodeus/nvm,jhliberty/nvm