allow multiple search paths for plugin manager and explicitly support reload
remove keys in favor of glfw keys and use enum class for event type
rename main loop class to application  and rename example project
prepare qt review and update cubescape demo
Merge branch 'master' into context

Conflicts:
	source/examples/viewer-glfw/CMakeLists.txt
	source/gloperate/CMakeLists.txt
Fix continous update of viewport in OSG backend which confuses camera manipulators that consider viewport changes as a reset. Both OSG and osgEarth camera manipulators seem to work fine now.
Change default camera settings in OSG backend
Fix check of supported file types for Qt loader/storer
Remove StringTemplate and StringSourceDecorator in favor of the new globjects classes
Merge branch 'master' of github.com:hpicgs/gloperate
OsgRenderStage: Add InputSlot for AbstractViewCapability, remove setViewport function
Fix glDrawBuffers call for more restrictive drivers
cmake adjustments and syntax
Enable git revision extraction in submodule contexts
OsgRenderStage: Add functions to handle viewport change and post-OSG-rendering callback
Add OsgFboRenderStage to render an OSG scene into an FBO and convert the textures for usage in a gloperate pipeline
Add method to access the VAO of a ScreenAlignedQuad
Merge branch 'master' of https://github.com/hpicgs/gloperate
OsgFboRenderStage: Preserve aspect ratio when viewport is resized
OsgFboRenderStage: Add depth buffer texture