Performance release #2

Linux version of builder had significant perf problems with linux builds jamming regularly... :(

this release fixes them using two important fixes:

 1) SDL_GL_SetSwapInterval(1) -- apparently if this isn't called, the perf sucks like hell/it jams on linux like hell 

 2) there's now some usleep(10ms) code which adds delay if frame rates are being issued too quickly. This prevents some
     wayland queue from filling and jamming the whole system.

This hopefully finally fixes the jam issues we have in the builder tool and make the tool usable again.