add category unit test. modify git ignore
git ignore being difficult
Update README.md
Merge branch 'master' into testing
reorganize skeleton and structure
Merge branch 'master' of https://github.com/fiddler-crabs-2014/thedelta
add unit tests
Merge pull request #27 from shaunmcgeever/testing

Testing
made failing tests temporarily pending to test Travis CI
testing settings of Travis CI
Merge pull request #28 from shaunmcgeever/testing

made failing tests temporarily pending to test Travis CI
Merge branch 'master' of https://github.com/fiddler-crabs-2014/thedelta