Implement PID controller to have a servo-engine.
Fix tests due to failing clumps-autotests.
fix inertia calculation and clump test
add output of inertia and mass to addToClump-example.py
Use combinedengine for ServoPIDController.
Merge branch 'master' of github.com:yade/trunk
Updated function descriptions for BubbleMat
Merge branch 'master' of https://github.com/yade/trunk
Fix hopefully clumps-autotests.
Add LudingPM.
Merge branch 'master' of github.com:yade/trunk
Merge branch 'ndyck'
Add an example for LudingPM.
export.VTKExporter improvement (intaractions export), SVD matrix decomposition in python, Peri3dController improvement (compatibility with O.save/O.load)
doc improvement of Peri3dController
Merge branch 'master' of http://github.com/yade/trunk
midified exporter.VTKExporter for correct interactions export in periodic case
Merge branch 'master' of github.com:yade/trunk
fix colors in releaseFromClump-example.py
add strainRate attribute to TriaxialStressController + fix bug in example script