Pytelegrambotapi

Change log:
- Bug Fix
- ReplyKeyboardMarkup support string in bot2.0

Change log:
- Support Telegram Bot 2.0 API's new features.

Change log:
- Add disable_notification parameter.
- Added setters for message/inline/chosen-inline handlers.

Change log:
- All Message's attributes default to None. Don't need hasattr to check attribute.
- Inline mode support.
- Add InlineQueryResultArticle, InlineQueryResultPhoto, InlineQueryResultGif, InlineQueryResultMpeg4Gif, InlineQueryResultVideo
- Add new method answer_inline_query
- Add new inline_handler

Change log:
- Code clean up
- Bugs fix

- New type File supported.
- New method download_file added.