Adding test cases for diffing based on `git diff` as the reference implementation.
Add example test for compliance with reference diff implementation.
Break <div>s onto newlines
Remove existing cells
Fix css. Add style for row divs.
Rearrange cells so they are in divs for easier experimentation
Adding script for taking the first version of the prototype and making it easier to deal with.
Add some useful html files for running generate_row_based_layout.py
Adding a script for pulling out individual cells from the original diff prototype.
rename index.html to diff.html
Rename index to diff in other scripts and files too
Creating basic PyPI package layout.
Cleaning up setup.py and HISTORY
Merge pull request #39 from tarmstrong/create-pypi-package

Create pypi package
Add entry_points to python package.
Merge branch 'master' into branch-new-layout
Write script to use single cell .html files to build diff prototype
Add example of deleted cell to nbdiff prototype
Add staging checkboxes to nbdiff prototype
Add .html files with single cells in them for prototyping.