renamed app.rb to ghoul.rb


Former-commit-id: 314ab3cd9e59b2c32e02eb748bd681c1303f67de
added pkg to gitignore


Former-commit-id: 44006e4e997502ce202ea7253771f5948cfa1429
fixed gitignore


Former-commit-id: 5561098ba288433abb80954341b8685729badf9a