Added debug drawing for pathfinding.  Made F11 toggle that and F12 toggle the object map debug drawing.
Modified cleric and mage descriptions.
Fixed ATK SPD calculation on hire and training screens.
Moved clipping from line drawing into pixel drawing so it looks better.
Changed void* casts to intptr_t to preserve type size.
Fixed end of level crash by removing extra walker deletion from obmap destructor.  There seems to be a memory leak of walkers somewhere...
Added support for FORCE_RESTORE_DEFAULT_CAMPAIGNS define that can be used for faster testing iteration.
Added window viewport scaling for OUYA.
Merge branch 'master' into dinomage

Conflicts:
	src/video.h
Added newlines to the Buy Full Game prompts.
Added price display to purchasing splash screen.