Removed the redundant request for Twitch global and channel emotes in getAssets().
Since these emotes will be processed anyways when generating the span, there's no point in wasting bandwidth to fetch and store them.
- Added enum for IRC tag command for slightly better comparisons
- Moved span portion of renderMessage to its own function in irc_api.dart
- Moved message remove and end scroll to seperate function action
- Fixed emote tags applying to all users
- Added userState and globalUserState fields to keep track of user data while chatting
- Adjusted CAP REQ commands to receive GLOBALUSERSTATE
- Adjusted return and break statements in switch and general cleanup
- Added sendMessage and dispose method
- Added user login to IRC NICK command
- Added first iteration of clearChat (#8)
- Moved parse method to irc_api.dart
- Fixed extra element when splitting snapshot data message
