Camera rotate now by dragging mouse
Merge pull request #1 from Akanoa/camera

Camera rotate now by dragging mouse: we can now use a fully implemented camera
remove *.pyc files
remove useless xml_tool.py
remove useless vec3.py
remove useless prints
Merge pull request #2 from Akanoa/camera

remove useless prints
Merge pull request #4 from Akanoa/primitives

Primitives
Merge branches 'primitives' and 'master' of github.com:Akanoa/Museum5A into primitives