Create TileMap

[mcgivrer]

Create a TileMap with its internal objects like TileSet, TileLayer and Tile.

• TileMap is the main GameObject,
• TileLayer is a layer of this tilemap
• TileSet is a set of tiles to be used into a layer to render graphic tiles
• Tile is the minimal graphic object to build a map.

A second step will provide a TileMapFactory.

the TileMapFactory will serve a loadFrom() method to load a full map from a text file with a specific language.

This language will expose keywords like @TILEMAP, @TILESET, @TILEMAPPING, @TILELAYER and @IMAGELAYER, to describe content of a full map. in this particular case, the map will describe a full game level.
In a third step, the @OBJECTS keyword will declare GameObject into the level. These GameObject's will be created through an EntityFactory.

Multiple TileLayer will correspond to multiple leveled layer.

see https://github.com/SnapGames/GDJ107/wiki/TileMapFactory for implmentation details.