udpated documentation for Node, GeometryNode and LODNode
added Doxyfile
Merge branch 'develop' of github.com:vrsys/guacamole into develop
added build target for documentation in sublime project file and fixed typos in Node documentation
moved background mode enum and PipelineConfiguration inside Pipeline class
added scenegraph and database modules in Doxygen documentation
Merge branch 'develop' of github.com:vrsys/guacamole into develop
updated documentation for NodeVisitor, started to document PickResult and removed opening browser command from documentation build target in sublime project file
Merge branch 'develop' of github.com:vrsys/guacamole into develop
Add CMakeLists for tests subdirectory.
Add test target.

Set GUACAMOLE_TESTS to ON during configuration. This will add an
additional test target to make.
Merge branch 'feature/ctest' into develop
finished documentation of PickResult
Merge branch 'develop' of github.com:vrsys/guacamole into develop
finished documentation of PickResult, this time for real
completed documentation of GeometryNode and LODNode and added documentation for PointLightNode
documented RayNode
Add cmake find script for unittest++.
Check for Unittest++.
Merge branch 'develop' of github.com:vrsys/guacamole into develop