A*-Algorithm finished

The A*-Algorithm is finished! All the methods in the main are showing
the step by step solution
Merge pull request #117 from MarcelBock/MarcelMaster_KI

A*-Algorithm finished
Merge pull request #118 from JanBTG/master

Added CMake OpenAL Support
Merge pull request #8 from GameEngineKoblenz/master

update own repo