Merge pull request #7 from oObqpdOo/master

Remove SoundManger - replace with new MediaPlayer
add GlobalInformation class

this adds a "static" class for global access to important properties, such as screen size, current room etc
cleans up the graphicalOutput, making it ready for performance improvements
remove initialized-flag from the subject

as the subject can now properly init itself, the isInit-flag and its methods can go away.
SoundManger

fixed volume control of the App