Setup testing infrastructure

[sjsrey]

Use travis for testing on changes to the atoms/content

Set up nightly testing to capture bugs induced by library version bumps

[sjsrey]

Look into automated testing of notebooks following this logic

and nbconvert approach

[sjsrey]

Testing locally, example

jupyter nbconvert --to=html --ExecutePreprocessor.enabled=True choropleth_classification.ipynb

Should generate:

[NbConvertApp] Converting notebook choropleth_classification.ipynb to html
[NbConvertApp] Executing notebook with kernel: python2
[NbConvertApp] Writing 453224 bytes to choropleth_classification.html

[sjsrey]

Working example of local tests here.

• Need to move into travis for automated testing
• recurse through all atoms directories to collect tests