update of cameras and input system

new camera class playerview that supports mouse input by changing
directions + testclass

pilotview supports multiple keys being pressed and fix of the pilotview
class
test classes update
inputtest fix
mouse and key at the same time
Scene rendering enabled

you have one render command instead of many!
error fix
skybox
Merge pull request #79 from MadeleineKolb/ownBranch7

playerview, pilotview
Merge pull request #80 from MarcelBock/MasterBackup_TRy

Scene Rendering Enabled