add .gitignore file
add .gitignore file

conditions:
 - os: windows, linux, osx
 - ide: sublimetext, jetbrains
 - languages: node
 - others: yoman

playnodeconf/playnode.io,playnodeconf/playnode.io-2015,rikapo/playnode.io,playnodeconf/playnode.io,playnodeconf/playnode.io-2015,rikapo/playnode.io