Added Antons hint to first install external depencies of Yade before following installation instructions
small typo fix
typofix
Add stl-gts example.
Add qt.View() to clumps-example.
Change in the calculation of the normal and tangential stiffness and damping. The change affects only the behavior
when one of the two parameters is zero, e.g. for two particles with different stiffness k1 and k2, the contact
stiffness will always be k = k1*k2/(k1+k2). Before it gave the same except when k2 = 0 (respectively k1 = 0), where it
gave k = k1 (resp. k=k2). This is done to ensure continuity in the behavior when one of the two parameter tend
to zero.
Add a function contactParameterCalculation in Ip2_ViscElMat_ViscElMat_ViscElPhys to avoid code duplication.
Add one more check-script to check the functionality of ViscoElastic PM.
Consider massMultiply-parameter, calculating parameters in
ViscoElasticPM.

Fixes the problem with --check, introduced in 6d4bd0
Fix paths to online and packaged documentation (fix url error with GUI's hyperlinks)
DEM Background chapter: a note on the semantic strain vs. displacement for contact kinematics
Merge branch 'master' of github.com:yade/trunk
Some hyperlinks in JCFpm doc corrected
Typos and hyperlinks corrected in Peri3dController doc
Add functions to save and load clumps.
corrected mistake in examples/test/triax.py
small fix in an example script tetra/oneTetra.py
Set the higher pripority in sys.path to self-compiled modules. Closes LP:1254708
Fix volume calculation. Closes LP:1261415

Fixes volume calculation in py/yade/pack.py due to integer arithmetics.
proposed solution. Thanks to Rafael Torres
Fix missing REGISTER_CLASS_INDEX(...) into ViscElPhys. This macro is essential for a right law dispatch !
Corrected a minor mistake in code comments : k=2*r*E