Update to Twitch client 3

Update code to handle /TWITCHCLIENT 3.  Better parsing of JTV input.
Wait less time for messages

The main event loop waits for 1 second if no message is received.  I
suspect there's a race here and that 1 second is actually causing
issues.  Lowering it to 200 to see if that helps message processing
speed.
Fix null ref exception in ChatSaver

Forgot to assign an instance variable, which lead to a crash when trying
to save chat.