Switch movie saving to thirty frames per second

I haven't tested this extensively; there may be bugs if you try to
save zero-frame or single-frame movies.
Fix compiler error in Visual Studio
Use renamed BodyNode::get/set Shape API.

BodyNode's Shapes getters and setters were extended, e.g.
getVisualizationShape and getCollisionShape.
Disable visualization of ground.
Update for renamed functions in DART
Merge remote-tracking branch 'origin/master' into eric/shape-refactoring

Conflicts:
	src/GUI/GRIPFrame.cpp
Merge branch 'master' of github.com:golems/grip
Merge branch 'eric/shape-refactoring'
Enable email notifications
DRY and generalize .travis.yml file