Add specific linkers for MacOSPlatform
fix shader versions
fix viewer glfw and application path extraction and shaders
Set core version 3.2 and depth buffer to 24 bit in QtViewer and QtExtendedViewer
add plugins path to plugin manager and rely on QCoreApplication path
Merge branch 'master' of https://github.com/hpicgs/gloperate
rename basic-examples
Merge branch 'master' of github.com:hpicgs/gloperate
remove debug output
revisit basic and extended examples and refine/unify cmake
continue review project structure and cmake
Merge branch 'master' into navigation

Some weird problems with plugin system (finding of plugins)

Conflicts:
	source/examples/ViewerQt/main.cpp
	source/examples/basic-painters/include/basic-painters/cubescape/CubeScape.h
	source/examples/viewer-qt/CMakeLists.txt