Enhance error reporting on Twitch main module

[lookeypl]

Whenever there is an unconventional situation, Twitch's main module doesn't have a fully safe-proof way of handling it. Right now many things require manual work step-by-step (this already happened and was hacky-fixed on 836d519). But, other parts (ex. joining an IRC Channel or loading Commands) can fail and might leave traces behind which require additional cleanup.

Rework this code to be more robust and have a better way of handling iffy situations.