First step of reorganizing profiling files:

First step of reorganizing profiling files:
* Move them all to includes/profiling/* - If you're using StartProfiler, you'll need to update that
* Make ProfileStub subclass the Profiler rather than duplicating function definitions conditionally
* Removed unused params to wfGetProfilingOutput(), only used in the stub, and they didn't do anything with them
* TODO: Kill $wgProfiling, make $wgProfiler a config array and move the various options to that. Also make into a singleton, rather than global (not much calls it outside of core)