**Renaming of modules and classes for consistency**
Module and Class renaming for better consistency.
This will break imports in existing scripts, but better now than later.
Fingerprints are now in the fingerprints module rather than in the transformers module
(all are transformers, so this is more descriptive)
_Fingerprint_ consistently spelled out in the class names, e.g. not FP, but Fingerprint
Descriptors in the descriptors module
Smiles2Mol is now in a new module called conversions
Also:
New transformer available: MHFingerprintTransformer