Change WinterBot into a class library

Swap winterbot project to a class library.
Add proper shutdown code

Add code to handle a clean shutdown to allow extensions to clean up
their work.
Add Winter specific extension, read stream stats

Add a class library for a specific streamer, separate from the main
library (first step towards adding extensions.
Changed the namespace (because it conflicts with the main class's name.
Added stream stats pulled from the streamer's json data.
Added new jukebox command implementation.
Make commands case insensitive

Commands should not be case sensitive.
Remove jukebox testing code

The jukebox code would spam messages because testing code was left in.
Change it back to 7 minutes.