New features in CC: Restitched 1.95.3

Several bug fixes:
* Correctly serialise sparse arrays into JSON (livegamer999)
* Fix rs.getBundledInput returning the output instead (SkyTheCodeMaster)
* Programs run via edit are now a little better behaved (Wojbie)
* Add User-Agent to a websocket's headers.

Type "help changelog" to see the full version history.
