Component plugin for memory reader and writer

See merge request ArmarX/RobotAPI!249

Merge remote-tracking branch 'origin/master' into feature/component-plugin-for-memory-reader-and-writer

(Polygons with 2 points are invalid)

RobotHealth: reporting data as debug observer datafield (FR)

See merge request ArmarX/RobotAPI!247

Resolve "Add gui actions to Grasp Memory to visualize Grasps"

Closes #72

See merge request ArmarX/RobotAPI!246

# Conflicts:
#	source/RobotAPI/components/armem/server/GraspMemory/GraspMemory.cpp
#	source/RobotAPI/libraries/GraspingUtility/GraspCandidateVisu.cpp

Minor fixes for grasp memory

See merge request ArmarX/RobotAPI!223

Merge branch '94-gui-crashes-in-context-menus-of-memory-viewer' into 72-add-gui-actions-to-grasp-memory-to-visualize-grasps

# Conflicts:
#	source/RobotAPI/libraries/aron/converter/eigen/EigenConverter.h

Merge remote-tracking branch 'origin/master' into 72-add-gui-actions-to-grasp-memory-to-visualize-grasps

Fix segfault in Memory Viewer when displaying Pose
Fix return type of ConvertToArray()

Improve armem prediction interface

Closes #99

See merge request ArmarX/RobotAPI!244

Revise Predictive: Split into Predictive (base, no children) and PredictiveContainer (with children)

Make ProviderSegment a Predictive, others a PredictiveContainer.
Remove non-const ref access to underlying container