AbiathRPC - Level downloading

A while ago in AbiathRPC development, I got the server to load levels from disk and transform them into something meaningful but also WCF-compatible. Today I got the client to download those levels and display them as though they were local. To do that, I had to write the level set proxy, which AbiathRPC swaps in when connecting to a server. It then clears the level view state dictionary (removing the image of the original temporary level), populates the level list in the Level menu, and updates the level label.

Server levels can be successfully viewed on the client. I am getting close to having some actual collaboration features working.