Merge Operations in to Gallery

It's big and scary, but if you look closely, the changes fall into these buckets:

* Simple renames of files - No content change, easy merge
* Updates to CSProj based on renames. May be a tricky merge, but we'll have a clear idea if it worked and what needs to be fixed up manually
* New stuff from Ops (which can be left alone for now).

This PR doesn't mean we're committed to doing this merge, so please do comment if you think this is too big and scary.