Py-fbchat

Added `onTyping`, see 237.
Fixed `setTypingStatus` on group chats.
Fixed some attachment parsing.

Fixed errors on unknown genders

Fixed 233
Fixed error when recieving `share` attachments

Removed copyright icon from README.rst, fixing 219

- Deprecated `sendMessage` and `sendEmoji` in favor of `send`
- Integrated attachment support when retrieving messages
- Added mention support, partial credit to svaikstude
- Added `eventReminder` function, credit to svaikstude
- Fixed problems with default mutable arguments, credit to ekohilas
- Started work on messenger rooms, credit to ekohilas
- Updated tests
- General cleanup