Fix segmentation fault in bodyNumInteractionsHistogram. (Closes: LP:1087680)
Use default {CMAKE_CXX_FLAGS_DEBUG for Debug-build instead of hardcoded.
little modifications of ConcretePM
Make the bug LP:1087680 visible again.
fix syntax error in a doc string (blocking the buildbot https://yade-dem.org/buildbot/builders/yade-full/builds/1741/steps/shell_3/logs/stdio)
Fix segmentation fault in bodyNumInteractionsHistogram.

(Closes: LP:1087680)
Return back the opportunity to keep all interaction pointers for each body
Use interaction pointers in body class instead of iteration over all interactions in body::py_intrs.
Merge remote branch 'upstream/master'
improvements in clump logic - part 3
improvements in clump logic - part 4
calm() function now also calms clumps
added example script for usage of clumpTemplate and replaceByClumps