Created an archive class for sync framework

Created SyncArchive for exposing the server's file listing to Ember. It's currently a bit 
empty, and uses the classes in EmberOgreFileSystem as a rought template.
Cleaned up SyncArchive class

Cleaned the SyncArchive class by fixing a few typos, removing some extraneous 
functions, and beginning work on the FindFiles function.
Modified WfutSession class for selective updates

Did some initial work on the WfutSession class so enable selective downloading of files.
This mainly consisted of connecting to a WFUT sigc signal for registering which files are
changed, disabling immediate syncing of all files, and writing in its stead the syncing of 
modeldefs and entitymaps.