oster/PLM — pull request #138 by polux (2014-03-16 18:41:52+00:00)
Title: First take at a Lander exercise

This pull requests adds the following:
- The world is now fully drawn.
- User input is taken into account (via the `step` method). The state of the world is exposed via getters and setters to the user.
- FullLander contains a basic demo which good enough to land the lander on this particular world with these particular initial conditions.