Fixed imports to comply with earlier changes.

All transition state methods were moved to `transitionstates.py`.
Removed TS training from kinetics/family.

Had already moved the loading to transitionstates.py
Corrected the labels when loading TS training and groups.

Added <family>/TS_*.
Copied and edited more methods from group additive kinetics.
getForwardReactionForFamilyEntry edited to extract distances.
Group additivity values now generated from training set

The method will now generate values, but the saveGroups
method still needs to be fixed. A TSData object would also
help in saving the uncertainties and comments. Currently the
entire database is loaded just to retrieve the reaction family,
so the transitionstates.py should be reworked to integrate better
with the original group additivity methods.