[z2502] Remove old recastnavigation files

(based on commit [12688] - e46b9d7)

Signed-off-by: Peter Camastral <petercamastral@gmx.ch>
[z2503] Reintroduce recastnavigation updated to commit rev

27-06-2014 23:23
returned MAX_ITER of optimizePathTopology to 32 after I removed the multi-nodes per tile
https://github.com/memononen/recastnavigation/commit/1c7bd46812966b6d46fefd7570a3043a2816fa2e

(based on commit [12689] - 0c389e4)

Signed-off-by: Peter Camastral <petercamastral@gmx.ch>