added Tile files
implemented Tile::draw
tiled are now added to a container in GameMap
added new files to cmakelists
Merge branch 'master' into tile-objects
fixed some build issues
tile objects are now drawn (inefficiently)
fixed warning
collidable tiles are now loaded; non-collidable arent drawn
removed unecessary update() overload
now only tiles on screen are drawn
fixed formatting issue in engine.cpp
renamed mTileList to mPhysicsTileList
implemented GameMap::addTilesToList
static tiles are now drawn (inefficiently)
removed GameMap::drawTiles()