Loads maps from .lua scripts, closes #2

-Corrected several bugs related to wrong tile parameter(using tile.gfx
instead of tile.tipo)
-Add map scripts, only simpleRooms.lua ported and tested
-Note that setting Tile.START only works on QtMapTools, to work here
you'll need to player:setPos(x,y) the start position
-Change Tile.FINISH to Tile.END
-Map Parameters don't work now, see #11

Signed-off-by: Gustavo Jaruga <darksshades@gmail.com>