modelgenerator
Merge remote-tracking branch 'mach/optilab' into master-optilab

Conflicts:
	resources/python/variant/model_generator.py
optilab moved to agros2d app
minor fix
optilab_interface introduced
standalone optilab removed
optilab generator test
variant optimization module introduced
unit test initialization fixed, optilab tests
small fixes, booth's function for optilab testing