Add js to gitignore
Add js to gitignore

Microsoft/TypeScript,alexeagle/TypeScript,nojvek/TypeScript,donaldpipowitch/TypeScript,RyanCavanaugh/TypeScript,microsoft/TypeScript,basarat/TypeScript,donaldpipowitch/TypeScript,weswigham/TypeScript,basarat/TypeScript,nojvek/TypeScript,SaschaNaz/TypeScript,weswigham/TypeScript,minestarks/TypeScript,SaschaNaz/TypeScript,basarat/TypeScript,SaschaNaz/TypeScript,alexeagle/TypeScript,weswigham/TypeScript,kitsonk/TypeScript,donaldpipowitch/TypeScript,kpreisser/TypeScript,nojvek/TypeScript,basarat/TypeScript,minestarks/TypeScript,minestarks/TypeScript,microsoft/TypeScript,Microsoft/TypeScript,kpreisser/TypeScript,RyanCavanaugh/TypeScript,microsoft/TypeScript,kitsonk/TypeScript,donaldpipowitch/TypeScript,Microsoft/TypeScript,RyanCavanaugh/TypeScript,SaschaNaz/TypeScript,kpreisser/TypeScript,nojvek/TypeScript,alexeagle/TypeScript,kitsonk/TypeScript