initial set of changes introducing python3 support
require at least boost v1.45
get some of the pickle problems resolved; this probably only works with python3 and is not yet 100% functional
ugly fix to get the rdchem tests working
this does not seem like the right way to be doing things longterm
more pickle cleanups
python2 fix
undo a couple un-necessary changes and, hopefully, get this working with python2 again
another python3 test failure fixed
fix FreeChemicalFeatures pickling and some syntax problems in testFeatures.py
fix DbCLI tests; includes fixing the pickling of SparseIntVects
fix a backwards compatibility problem
clean up another batch of missed ResourceWarnings
should fix python2 compatibility problem
really fix the python2 problems this time?
<sigh>
switch generate_fraggle_fragmentation to return a sorted list of fragments; this clears up a difficult-to-understand problem with the python3 port
python3 cleanup
fix some more tests
fix some more tests
fix a bunch more warnings/python3 errors