added intellij android studio to gitignore
added intellij android studio to gitignore

EdgeCaseBerg/green-web,EdgeCaseBerg/GreenUp,EdgeCaseBerg/GreenUp,EdgeCaseBerg/GreenUp,EdgeCaseBerg/GreenUp,EdgeCaseBerg/green-web,EdgeCaseBerg/green-web,EdgeCaseBerg/GreenUp,EdgeCaseBerg/GreenUp,EdgeCaseBerg/green-web,EdgeCaseBerg/GreenUp