Added Oculus SDK 0.2.5c.

This is the contents of the ZIP and .tar.gz files from the Oculus developer site plus the following changes:
* OVR_Profile.cpp contains a fix to allow fetching the home directory on a Linux machine where the accounts come from a Windows domain controller.
* The OSX libraries have been rebuilt with RTTI turned on.
	Upgraded IHmdSystem:
	* Added config and log paths to the Init function so Steam can tell us where to put that stuff.
	* Switched VR_GetControlPanel to VR_GetGenericInterface so it will work for any interface and not just the control panel interface
	* Added interface adapters for IHmdSystem versions. Added version 2.
	* Added env vars so vrclient.dll can tell vrserver.exe where to put its log and config files
	* Added interfaces to find for all the CURRENT versions of IHmdSystem, IHmd, and IVRControlPanel
Binaries to go with all the recently updated source.