Mouse controls by art0rz
https://github.com/art0rz

Added mouse look

Improved mouse look. Now correctly applies the camera's matrix

Added scroll wheel zoom

Action speed is now applied to mouse look/zoom

Holding down a mouse button on a viewport and using WASD control now works. In perspective viewports, QE for rotation and ZX for up/down

Action scaling can now be changed by scrolling while holding a mouse button down on a viewport

Pressing W while holding mouse button down on a viewport will no longer cycle through wireframe modes

Closes #2, closes #36