Add license to gemspec.
Add license to gemspec.

sulestone/devise,Ataraxic/devise,twalpole/devise,andyhite/devise,djfpaagman/devise,yakovenkodenis/devise,vincentwoo/devise,ram-krishan/devise,ram-krishan/devise,yui-knk/devise,davidrv/devise,dgynn/devise,thejourneydude/devise,chadzilla2080/devise,tjgrathwell/devise,ngpestelos/devise,sferik/devise,HopeCommUnityCenter/devise,onursarikaya/devise,LimeBlast/devise,zarinn3pal/devise,4nshu19/devise,Fuseit/devise,jnappy/devise,Umar-malik007/devise,andyhite/devise,djfpaagman/devise,Serg09/devise,nambrot/devise,hauledev/devise,didacte/devise,tiarly/devise,evopark/devise,sferik/devise,havok2905/devise,randoum/devise,joycedelatorre/devise,chrisnordqvist/devise,thiagorp/devise,xiuxian123/loyal_device,buzybee83/devise,shtzr840329/devise,solutelabs-savan/deviseOne,hazah/devise,nambrot/devise,riskgod/devise,Serg09/devise,testerzz/devise,Umar-malik007/devise,stanhu/devise,evopark/devise,solutelabs-savan/deviseOne,deivid-rodriguez/devise,DanFerreira/devise,Umar-malik007/devise,shtzr840329/devise,zarinn3pal/devise,evopark/devise,testerzz/devise,randoum/devise,sharma1nitish/devise,sespindola/devise,jahammo2/devise,ram-krishan/devise,bonekost/devise,thiagorp/devise,MAubreyK/devise,hazah/devise,SadTreeFriends/devise,eaconde/devise,posgarou/devise,xymbol/devise,SiddhiPrabha/devise,SadTreeFriends/devise,buzybee83/devise,SiddhiPrabha/devise,riskgod/devise,ar-shestopal/devise,sharma1nitish/devise,satyaki123/devise,SiddhiPrabha/devise,MAubreyK/devise,ar-shestopal/devise,rubyrider/devise,satyaki123/devise,Odyl/devise,onursarikaya/devise,sharma1nitish/devise,riskgod/devise,keeliker/devise,yui-knk/devise,LauraWN/devise,rubyrider/devise,sideci-sample/sideci-sample-devise,Odyl/devise,eltonchrls/devise,kewaunited/devise,onursarikaya/devise,nambrot/devise,bobegir/devise,betesh/devise,Qwiklabs/devise,betesh/devise,HopeCommUnityCenter/devise,Bazay/devise,stanhu/devise,gauravtiwari/devise,fjg/devise,Bazay/devise,sulestone/devise,deivid-rodriguez/devise,cassioscabral/devise,yannis/biologyconf,yizjiang/devise,janocat/devise,bobegir/devise,dgynn/devise,plataformatec/devise,HopeCommUnityCenter/devise,sulestone/devise,plataformatec/devise,tjgrathwell/devise,rlhh/devise,9040044/devise,yizjiang/devise,Serg09/devise,leonardoprg/devise,bolshakov/devise,silvaelton/devise,marlonandrade/devise,rlhh/devise,cefigueiredo/devise,jnappy/devise,thejourneydude/devise,xymbol/devise,ngpestelos/devise,JaisonBrooks/devise,posgarou/devise,yizjiang/devise,timoschilling/devise,joycedelatorre/devise,JanChw/devise,NeilvB/devise,testerzz/devise,marlonandrade/devise,xymbol/devise,NeilvB/devise,LimeBlast/devise,Legalyze/devise,twalpole/devise,havok2905/devise,gauravtiwari/devise,keeliker/devise,cefigueiredo/devise,MAubreyK/devise,tiarly/devise,hauledev/devise,keeliker/devise,robertquinn/devise,DanFerreira/devise,RailsDev42/devise,posgarou/devise,Odyl/devise,kewaunited/devise,kewaunited/devise,RailsDev42/devise,Diego5529/devise,Ataraxic/devise,randoum/devise,tjgrathwell/devise,betesh/devise,Diego5529/devise,JohnSmall/device-plus-mods,Qwiklabs/devise,Course-Master/devise,denysnando/devise,JaisonBrooks/devise,joycedelatorre/devise,imaboldcompany/devise,Angeldude/devise,chadzilla2080/devise,bobegir/devise,LauraWN/devise,thejourneydude/devise,bonekost/devise,vincentwoo/devise,yui-knk/devise,zvikamenahemi/devise,jahammo2/devise,sideci-sample/sideci-sample-devise,dgynn/devise,Angeldude/devise,didacte/devise,JanChw/devise,RailsDev42/devise,Fuseit/devise,Angeldude/devise,zvikamenahemi/devise,chrisnordqvist/devise,yakovenkodenis/devise,vincentwoo/devise,davidrv/devise,marlonandrade/devise,denysnando/devise,eaconde/devise,gauravtiwari/devise,yannis/biologyconf,eltonchrls/devise,LimeBlast/devise,JanChw/devise,twalpole/devise,silvaelton/devise,eltonchrls/devise,rubyrider/devise,9040044/devise,havok2905/devise,jahammo2/devise,tiarly/devise,Diego5529/devise,yang70/devise,rlhh/devise,hazah/devise,imaboldcompany/devise,yang70/devise,andyhite/devise,DanFerreira/devise,Ataraxic/devise,hauledev/devise,Legalyze/devise,cassioscabral/devise,timoschilling/devise,buzybee83/devise,thiagorp/devise,cefigueiredo/devise,LauraWN/devise,didacte/devise,ar-shestopal/devise,Bazay/devise,4nshu19/devise,NeilvB/devise,denysnando/devise,silvaelton/devise,solutelabs-savan/deviseOne,SadTreeFriends/devise,yang70/devise,bolshakov/devise,djfpaagman/devise,4nshu19/devise,Course-Master/devise,chrisnordqvist/devise,fjg/devise,yannis/biologyconf,9040044/devise,leonardoprg/devise,chadzilla2080/devise,satyaki123/devise,shtzr840329/devise,yakovenkodenis/devise,Legalyze/devise,janocat/devise,sespindola/devise,JaisonBrooks/devise,janocat/devise,zarinn3pal/devise,bonekost/devise,sespindola/devise,eaconde/devise,davidrv/devise