* bring over XQMol.h
* bring XQMol over for a separate PR
* backup... need to move these files
* refactor
* substruct
* oops
* testing basics
* basic tests
* more test
* more testing
* add empty() method to MolBundle
* easy creation of ExtendedQueryMols
* SRU test
* reorg
* the MolEnumerator should clear out residual reaction properties
* support to/from JSON
* cleanup
* first past at python wrappers
put the new code in a namespace
* less stupid names
more tests
* undo some unnecessary changes
* remove compiler warning
* release GIL during hasSubstructMatch too
* support adjustQueryProperties
* support toggling which operations apply
Fix the tautomer tests to include a molecule which actually requires the tautomer matching