Merge pull request #1 from mfrancis95/mike

Tested out a map and screen coordinates system. Limited the unit movemen...
Merge pull request #2 from mfrancis95/mike

Added GripMap and Location.
Moved GridMap and Location to new package com.amf.engine. Renamed Game to MikeGame. Create your own Games under com.amf.game to test out your own changes with your own version of the game.
Added a resources folder with a test tileset.
Added TileSet class for managing textures.
Tileset is now implemented as a HashMap of tiles.
Added equals() method to Location for hashing purposes.
GridMap now contains a HashMap of tiles in addition to entities. The tiles are represented as their coordinates in the tileset instead of the actual images.
getTile() uses a Location to query the tile instead of separate x and y parameters. This makes calls from GridMap.getTile() easier to make.
Added a Tileset test to the game. Randomly generates tiles to use at the start of the program.