0.8

• Huge speedup for k-prototypes, especially for large numbers of samples (#45). A k-prototypes benchmark script is included in examples now.
• Offer an implementation of Ng's dissimilarity measure, which could improve convergence (#37).
• Allow pandas DataFrames to be presented to the algorithm, instead of just numpy arrays (#40).
• Improved handling of dependencies (#49, #53).
• Various small bugfixes and improvements.