Add TileMap

Bring simple tilemap to render levels.

Based on simple properties file like, propose a design to load, draw and detect collision for all Entity.

TileMap is the Level design containing the references for tiles and map of layers.
It will also contain a loader to read level from file and create corresponding entities, an pop-up them into the level.

Entity will be

• player,
• balls (red and blue) to raise energy and mana,
• coins or treasure for richness building :)
• and traps to loose energy or mana, depending on trap nature (to be defined).
• doors in and out.

NOTE
Some moving enemies may be added later. Adding some enemy generator as in Gauntlet

Level entrance and exit must be also managed to set the entry-point for player, and the level door exit.

NOTE
A level definition may have multiple doors to link with multiple levels/rooms.