Added commands, etc fixes/additions
- Added FiredEvent.reply()
- Added Command()
- Added API.hookChat,callAlias,addCommand
- Changed callHook() behavior (returns object)
- Added @cmd decorator to Plugin
- Set sv_sayprefix and sv_tellprefix on boot, along with sending a boot-message
- Added COLORS, COLOR_FORMAT and helper C() function to const
- Redid chat parsers with regex, added ClientUserInfoChanged parser
- Fixed up Player()
- Added test command
- Added prefix to config