DebugDraw for recast now caches the results
We now have a drawmode dropdown selector
drawmode changes come from the gui itself no longer from console values
all recast drawmodes are supported with the exception of drawmodes that add abilities like navqueries until the nav tester tool is imlpemented.
Added chunkytrimesh - this class splits up the geometry the navmesh is interested in into kdtree for fast traversal, makes the actual navmesh generation work with smaller chunks.
Now only 1 RecastPolylist per navmesh this can be saved out in a future commit.
This is a history commit, all functionality works same as it did before but it matches recasts recommended setup more closely. Future additions may break backwards compatibility.
Many instances where we would create a object via a new call, and then check that it was non-null.
This is redundant, as if we ever were in a situation where new failed, we'd be crashing left and right already, so the additional check is wasted processing.
