Add adjustment to Recast Demo for TrinityCore MMAPs.

- enable DT_POLYREF64
- fix some Win x64 build and debug issues
- add TrinityCore types and defines
- allow *.mmtile files to be loaded and displayed through the "Load mmtile" button
- Sample_SoloMesh loads only the tile of the current *.obj
- Sample_TileMesh loads the tile of the current *.obj and its 8 neighbors if available
- speed up the mouse wheel zoom