Fix minor mistakes and clean up
Wireframe mode toggle key
More exception safety.

I think.
Merge remote-tracking branch 'robn/new-ui' into new-model

Conflicts:
	src/Intro.cpp
	src/Intro.h
	src/Pi.cpp
Modify thruster importing again

Seems to work properly with collada (see test_meteor) now. Getting just a back vector was not enough for the direction since a modeller might have rotated the node around all axes.
Animation channels does not need to be public
Set animation duration to its actual value
Override animation playback with SetProgress

This is currently the only way to control an animation, should make it easier to get landing gear animations goind
Make ship landing gear animation to work

Looks for "gear_down" animation in the model
Remove a redundant model file

Landing gear from Natrix somehow in Meteor folder
Merge remote-tracking branch 'robn/new-ui' into new-model
Clamp the blending factor
Minor shader fixes

 - forgot normalize :)
 - zero specular alpha
Merge remote-tracking branch 'robn/new-ui' into new-model

Conflicts:
	src/Pi.cpp
Add scale keyframe support
Collision visitor transform bug
Collada animation splitting

Collada uses seconds instead of frames
Animation slider instead of stop/play
More blenderistic camera controls with numpad

1,3,7 (+ctrl) view presets
2,4,6,8 rotate
FindNodeVisitor

Can be expanded with various search methods. Can replace Node::FindNode.