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
Merge pull request #11 from starcalibre/preproc-doctests

Doctests and clustering methods
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
Merge pull request #17 from jni/gitter

Add gitter badge