Update the documentation of the ompThreads attribute.
- fix again the offset of ids in SpherePack.toSimulation (previous fix was assuming two bodies per clump)
little modifications
- fix https://bugs.launchpad.net/yade/+bug/923929 again, as shown by François it could still happen in some cases (see example in the bug report)
- remove the check/throw when generating aperiodic 2D packings, since the algorithm actually support that.
added example script for CombinedKinematicEngine
Correct a remaining bug into the toSimulation() python function.
Fix the computation of viscous forces by using the
correct positions of bodies (updated in
buildTriangulation), and fix some variable names.
Minor fix in documentation.
Fix pack.py as suggested by Kneib François.

http://www.mail-archive.com/yade-dev@lists.launchpad.net/msg08412.html
Corrected toSimulation() (for the last time I hope :-) ).
Remove all Py_BEGIN_ALLOW_THREADS and Py_END_ALLOW_THREADS to prevent race conditions in python-bindings. (Closes LP:1056684)
Return back some Py_BEGIN_ALLOW_THREADS, as the previous commit freezes autotests.
Fix a bug in growParticles(...) method.
Growing a clump is now really homothetic. Before that, growing clumps seemed to be homothetic but at the next timestep the original position of members was reseted.
Remove fictious spheres from the computation of edge surfaces (employed in the computation of viscous forces)
Define O.engine with a default list at startup, with example script and notes in the documentation.
remove utils prefix
Add url to Chen`s thesis.
- Updates and improvements in the triax-tutorial material
- smallfix in a note in introduction.rst
fixed version of the triax script for clumps