Dropping static copy of jquery.treeTable

Users should provide their desired copy of jQuery and jQuery.treetable.
Updating .travis.yml, getting tests to pass
Renaming test files so Django 1.6 will find them
Loading a future compatible version of  for Django 1.4
Install categories in editable mode
Fix #1: Flakey test

CategoryTestCase should be self contained now. I also added the class
method Category.create for convenience.
Forgot to change an import after renaming test file
Test function names match content of tests
Ignore sublime text files.
Adding RBGB to copyright notice
Point the travis-ci badge at rbgb dev branch.
Consolidating contributors into README
Dropping the patch numbers from Django versions
Updating author details in setup.py
Bumping version to next realease target (2.0.0)