Fixes #170
add locale lock to mol2 and tdt parsers as well
remove some extraneous checks
add MolOps::get3DDistanceMat()
Merge branch 'master' of github.com:rdkit/rdkit
clean up bug from that last fix; modify the distance histogram
code so that it takes the distance matrix in the ctor
remove more extraneous preconditions
remove clang warning
remove more clang warnings
remove more clang warnings
remove more clang warnings
small SSS optimization
- added relative DistanceConstraints (i.e., +/- with respect
  to the current value) (C++/Python)
- added absolute/relative AngleConstraints (C++/Python)
- added absolute/relative TorsionConstraints (C++/Python)
- added PositionConstraints (C++/Python)
- exposed fixedPoints from Python
- added relevant C++/Python tests
- removed a number of redundant "this->" in member functions
- moved some getGrad() code into Utils::calcAngleBendGrad and
  Utils::calcTorsionGrad to avoid repeating the same code
  for constraints
make sure there is ring info available
merge
merge
complete merge
support providing a distance matrix to the O3A ctor
- the RMSD value returned by O3A::align() and O3A::trans() is now
  computed in the usual way, while previously the value computed
  by MolAlign::AlignMol(), which incorporates weights, was returned
- the C++ and Python test results were updated accordingly
Merge pull request #173 from ptosco/master

O3A::align() and O3A::trans() now return "true" RMSD value