Updated Streams Definitions

Removed code that looked at global channel config property for user
preferred stream quality, replaced with a generated list of available
streams and left MB3 Server to decide which stream to serve. This
solution managed to keep the overall pull of the TWiT RSS feed to once
per twit show, to fetch all available episodes and qualities for that
particular show.
Additional: Updated NuGet Packages
Additional: Removed all references to global server config
---------------------------------------------------------------
Tested working with latest MB3 Server Beta as of today