Update recast to https://github.com/memononen/recastnavigation/commit/1dd5cf1883d61e723fef3d4957cf758c50e7a52b Fix 2 warnings. These changes have no effect on MMAPs and it's not needed to re-extact them.
Remove old files from recastnavigation folder and update the structure to the same of https://github.com/memononen/recastnavigation/ to allow easier updates.