Properties consisting of digits will be interpreted as a string now.

Affects Object, ObjectLayer and Tile.

This means, that if you want to use a property value as an int now,

you should use int(object.['property'])
You can now define directions (t,r,b,l) and colors(0,1,2,3) in the map.

The player object only support the direction property, while enemies

support both the direction and color property. Fixes #4.