Add GL debug output capability
minor fixes
Merge branch 'develop' of https://github.com/vrsys/guacamole into develop
- temporary fix for lazy pipeline instantiation
fixed multicontext handling in video3d
Merge pull request #50 from scholli/develop

Develop
Fixed wrong error message for video node
Merge branch 'develop' of https://github.com/vrsys/guacamole into develop
Merge pull request #52 from scholli/develop

Develop
Use std::atomic<bool>.
Remove debug message.
removed hostname check
removed log warning
Merge branch 'feature/video3d_hostname' into develop

Conflicts:
	src/gua/scenegraph/Video3DNode.cpp
Merge pull request #40 from 4og/feature/debug_output

GL debug output in guacamole
removed debug output of ctx.id
implemented boundingbox support for video3d
Merge pull request #54 from vrsys/feature/video3d_boundingbox

Feature/video3d boundingbox
overwrite boundingbox from .ks-file
implemented boundingbox uniform for reconstruction