Required fixes:
- CallbackQuery is now comparable.
- Message.effective_attachment, Message.photo,
Message.new_chat_members, Message.new_chat_photo &
Game.text_entitties semantic fixes - when they are not defined,
return an empty list.
- Docstring fix to Update class.
* fixes broken test with PhotoSize, Game and Animation
However:
testSendGame and test_set_game_score both produces *BadRequest: u'Wrong file identifier/HTTP URL specified'*.
* fixes test_set_game_score
* adds to_dict method to Game to prevent extra collection type checks in base.TelegramObject
Still need setGameScore (I'm thinking we can set it to the ever increasing
envvar 'TRAVIS_BUILD_NUMBER') and getGameHighScores.
The tests currently don't work... Since I don't really understand how
PhotoSize works... Please halp :P
