Started to work on a CMake build file
Changed the Artemis submodule to point on another one
Pulled down latest commit in the new Artemis submodule
Now possible to compile the project with CMake
CMake does now download Artemis and compiles it by itself
Removed the Artemis submodule, updated include references to Artemis and
make it possible to compile the project with CMake without Box2D and
Allegro installed.
Updated the README file
Merge branch 'feature-cmake' into feature-box2d-integration