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 read CSV functionality
Add matplotlib to .travis.yml
Add os.path.join to file references
Add mongo to travis.yml, change test DB to local instance
Add before_script commands to .travis.yml
Change wait -> sleep in .travis.yml
Change matplotlib to use 'Agg'
Set DISPLAY for .travis.yml

From: https://github.com/scikit-image/scikit-image/blob/master/.travis.yml and https://github.com/pymc-devs/pymc/issues/474
Attempting to fix 'RuntimeError: Invalid DISPLAY variable ' error
Remove plotting from demo
Merge pull request #15 from starcalibre/test-data

Add test dataset