FIX THINGS! ... also move everything around.

Made `Gruntfile.js` a bit simpler-

 * No longer need to copy files
 * do livereloading with connect-livereload
 * runs sphinx-build directly
 * two tasks - `default` is to run and debug css, `build` will compile minified css for commiting / packaging

All theme files are now in `./sphinx_rtd_theme/` which is a python package

`requirements.txt` and `Gemfile` added for installing dependencies with pip and bundle

updated package.json for dependencies used with live-reloading

setup.py now makes a working pip package - included correct files, reads requirements.txt and README.rst.  
package version is now applied correctly

sass lives in `./sass/` and is compiled into `./sphinx_rtd_theme/static/css/`.

compass config moved to `compass.rb`; now works with a production or dev environment (minifying css or not)

README could probably do with a bit of modifying to reflect changes.