Keen Modding Live - Preload static data

A lot of information in Keen Modding Live won't change very often at all, like the list of zones or of episodes. Previously, Abiathar Live Studio would contact the API endpoint every time that information was needed. Today I adjusted it to download all the effectively-static information just once at logon/startup. This allows a couple dialogs like New Live Level to open immediately instead of after an API request.