Added some doctests to preprocessing
Added doctest to MDS function
Added kmeans clustering and doctest
Add DBSCAN clustering
Added recommended changes
Added recommended changes take2
Added recommendations, removed **kwargs usage
Fixed MDS function
Fix MDS docstring
Added backticks
Add test dataset, mongo collection, images
Add CSV copy of test data
Amend variable names and iterators
Use .pickle file extension
Rename/move db demo script
Rename dummy file to .gitkeep
Add pymongo to .travis.yml
Add gitter badge
Add read CSV functionality
Add matplotlib to .travis.yml