Additions!

AssaultCube:
![assaultcube](https://cloud.githubusercontent.com/assets/5674757/3018427/50ec24cc-df85-11e3-81ac-2a6757352c6d.png)

Cube 2
![sauerbraten](https://cloud.githubusercontent.com/assets/5674757/3018151/8fc1d3c0-df82-11e3-8c86-d40bdcc0e6f4.png)

Tiled Map Editor
![tiled](https://cloud.githubusercontent.com/assets/5674757/3018156/970f5238-df82-11e3-9b9f-57ad80b3efe9.png)