Full Featurizer

Adds a full_feature_vector() method to the ElMD() class which returns a complete featurization vector (n=8076) for each composition. Returns the mean, weighted mean, min, max, range, and std. deviation of all available elemental feature lookup tables (excluding permutations of one hot encoded atomic scales).

Fixes pip bugs that occurred in development for versions 0.4.16-18 due to mismatching version numbers in setup.py and init.py