Rewrite permalink function

And add option to enable/disable
Replaces GetOwnedGames calls, addresses #286

Now proxying these requests through api.enhancedsteam.com
Replacing Library API calls, addresses #286
Removes last API key, closing #286

This function is public and the API key doesn't appear to be required.
Found one more in the options page
First set of regional pricing options

Allows the user to select how it's displayed or not at all.
Hide price options by default