Added rotating dock class.
Added rotation button that will allow the player to rotate certain structures.
Added rotation button to rotation launch controls.
Added hover states to rotation buttons.
Added Rotation Structure Parent Class
Fixed rotation selection in launch controls to just rotate launch platforms and not other structures.
Updated toggle button image.
Added new image for rotating dock.
Added degrees label to rotation control buttons.
Fixed physics of rotating block structure.
Merge branch 'feature/Add_a_rotating_structure' into develop