Added some comments and made the Dropsuit.show_stats sort stats in alphabetical order so the output can be predicted for tests
Tests for Dropsuit class
Added an Exception to be raised when a Dropsuit cannot be found in the data
changes to DropsuitLibrary to accept a filename or stream
DropsuitLibrary tests and started on Fitting tests
More tests for the fittings module.  Added a run_tests.sh script.  Changed the README to add testing instructions