added gui for elevator
Merge branch 'master' of https://github.com/tobiasvdp/industrialProcessing
Merge branch 'master' of https://github.com/tobiasvdp/industrialProcessing
Merge branch 'master' of https://github.com/tobiasvdp/industrialProcessing
added levels to    the elevator
Merge branch 'master' of https://github.com/tobiasvdp/industrialProcessing