Sb directory added under src/components

Removal of SBNavigationMesh.

Removal of Detour/Recast.

Removal of SBParsers/SBAssetHandlers that won't be used.
Addition of testSBInt
(a small ogre code that will soon make me able to test if all the required
functionalities of Sb are still well handed)
Modifications to App, Bonhomme, Entity and Sb.
Minor changes to Bonhomme
Addition of new mesh and skeleton.