* Support more formats and add new method returning deleted fragments
* Reduce number of changes and make more visible what has really changed
* Add 'UnitTestSaltRemover' and perform changes suggested by review
* Add support for 'smi' file
* Improve doctest regarding new functionality
* Following suggestions made by collaborator
* Be consistent with 'ValueError' and add an example without tuple destructuring
* 1194: Review assignments of range in Python code
Task-Url: https://github.com/rdkit/rdkit/issues/1194
Either wrapped the range expression into a list or made sure that the
code is working with a range object.
* Removed use of deprecated string module functions
* update .gitignore
* foundation for 3D descriptors
move PBF into core
* cleanup work
* a bit more cleanup
* move the principal moments calc to MolTransforms
* cleanup
* cleanups
* add caching of the principal moments and values
* do not include the 3D descriptors in MolDescriptors.h
* the properties are computed
* add PMI descriptors and tests
* add tests for NPR descriptors
* return 0 when the largest PMI is zero
* PMI edge case tests
* NPR edge case tests
* PBF edge case tests
* PBF edge case tests
* more edge cases
* add a few more 3d descriptors
* add defns to docs
* tests for the new descriptors
* add versions to new descriptors
* add 3d descriptors to python wrapper
* add eigen support to the travis build
* try to get non-windows builds working
* remove computeCovarianceMatrix() from java wrapper
* make pmi property names "private"
