Remove cookie-priming fix

This may break starting a new stream after the lengthy watching of a stream.

However, I think using Requests and the way cookies are saved/restored,
that this is no longer needed.
Rip out caching

Every time the skin asks for season-and-week data, it'll get it fresh.
We'll make it the skin's job to cache. Thankfully, this is a non issue
since the skin keeps that data in memory while running.

The seasons and week data doesn't change frequently, so there's no
problem with not checking if its expired. Restarting the addon will
requests new data, so we now no longer have caching bugs/problems.

This also removes plugin.cache (StorageServer) as a dependency.

As a side-effect of this work, the Hall of Fame game is appropriately
labeled.
Fix for wrong game played in the archive - issue #76
Stop url en/decoding to pass game versions

This also removes two imports from default.py

This hopefully takes care of issue #75.
Fix for busyDialog not closing when playing.
Bug fix: future weeks will now be greyed out
Cleanup unused imports
Remove unused images

I didn't realise we still had these around. We don't use them, and we can't
use them due to the NFL logo.
Make the background also fanart

I don't like moving this image to the root directory, but a symlink is
out of the question due to windows. :-/
Update addon.xml information
Update changelog

So many bug fixes, might be time for a bug-fix release soon.