2018 sep20 (#243)

* Pull subtree to master branch.

* Squashed 'moose-core/' changes from d229eba6bb..8463cc73e5

8463cc73e5 Update setup.cmake.py (#307)
8c38fc6d60 Removed deprecated warnings from neuroml2 reader (#305)
6df4332d2d Fixes to BOOST based steadystate solver (#306)
99dd7d2503 Merge pull request #302 from BhallaLab/chhennapoda
86c4244522 Merge branch 'master' into chhennapoda
ec06b242ae HotFix: Fix regression in StreadyState solver caused by #293. (#304)
6b79f6701c prefer .so suffix over CPython version specific suffix . this way a wheel compiled by any version of python3 will work with any python3.
92da6a7fb8 removed python-libsbml from install dependencies; added matplotlib. sbml and neuroml packages should be installed by user and not automatically. They may not be available for all distribution of python on all OSes.
e2bc19c0e4 Merge branch 'master' into chhennapoda
385a5cf0a1 Merge pull request #303 from upibhalla/master
080767c5aa Fixes to rdesigneur due to bad merge. Clean...