Logic: Add serialization type conversion.

git-tfs-id: [https://tfs.codeplex.com:443/tfs/TFS15]$/Atomix;C40636
Logic: Clean up Convert function.

git-tfs-id: [https://tfs.codeplex.com:443/tfs/TFS15]$/Atomix;C40637
Logic: Fix deserialization.

git-tfs-id: [https://tfs.codeplex.com:443/tfs/TFS15]$/Atomix;C40638
Game: Testing not-null when loading level.

git-tfs-id: [https://tfs.codeplex.com:443/tfs/TFS15]$/Atomix;C40639