improved VisualizationFactory interface

See merge request sw/simox/simox!126

Fix/urdf collision models

See merge request sw/simox/simox!125

improved VisualizationFactory interface; semi-transparen visualization of collision / primitive models

fix: collision nodes: previously ignored local pose; fixed also in visualization

See merge request sw/simox/simox!123

Use explicit namespace qualification

See merge request sw/simox/simox!124

Four bar joint system (early draft)

See merge request sw/simox/simox!120

Merge branch 'feature/torso-joint-four-bar' of git.h2t.iar.kit.edu:sw/simox/simox into feature/torso-joint-four-bar

# Conflicts:
#	VirtualRobot/CMakeLists.txt

Hemisphere Joint IK

Closes #62

See merge request sw/simox/simox!121

Merge remote-tracking branch 'origin/feature/hemisphere-joint-ik-with-roso-joint-four-bar' into feature/torso-joint-four-bar

Fix/eigen nlohmann incompatibility

See merge request sw/simox/simox!117

# Conflicts:
#	VirtualRobot/IK/DifferentialIK.cpp
#	VirtualRobot/Nodes/RobotNodeHemisphere.cpp