WIP
Merge branch 'master' into partial_cgutils_migration
Merge branch 'context' into partial_cgutils_migration

Conflicts:
	source/gloperate/CMakeLists.txt
migrate cgutils classes for arboretum
address review comments (PR #25):
rename cgutils.h to directorytraversal.h
adjust UnifromGroup includes
Merge pull request #25 from apopiak/partial_cgutils_migration

(Partial) cgutils migration