Fix three warnings added in fc5df2c, and increase the text pool size in
the demo. This would frequently be overflowed, even just by building
with the default settings and expanding the log.
- Added detail height mesh generation (RecastDetailMesh.cpp) for single,tiled statmeshes as well as tilemesh.
- Added feature to contour tracing which detects extra vertices along tile edges which should be removed later.
- Changed the tiled stat mesh preprocess, so that it first generated polymeshes per tile and finally combines them.
- Fixed bug in the GUI code where invisible buttons could be pressed.
Detour: Prefixed static nav with 'dtStat', this includes polys and poly refs too.
imgui: Made imgui code not to use id:s anymore, since there were way too many id clashes.
imgui: Separated the rendering code into its' own file, changed prebaked font to use stb_truetype instead, removed glfont.
imgui: Added 'disabled' property to widgets.
Recast: exposed single triangle rasterization into the recast api.
Demo: Changed the debug draw validation to be "soft", easier to demo now.
