Rename MAP_TILE_SIZE to MAP_BUILD_TILE_SIZE
Path: Rename Tile objects to BuildTime
World: Rename IsTileAccessible() to IsBuildTileAccessible() + TileAlign() to BuildTileAlign()
World: new helper ToBuildTile()
Renderer: Build tile rendering in debug mode
UnitDesc: Mine and Townhall dimensions are multiples of MAP_BUILD_TILE_SIZE
BuildTileAlign() consider unit type => building are really aligned to build tile
Display boundingbox in DEBUG mode only
Units have more speed in DEBUG mode
Debug: When an movable unit is selected, render clickable(accessible) build tiles