Initial implementation of grunt

- Removed closure compiler
- Naming builds bluebutton.js and bluebutton.min.js
- Added sample bluebutton.html page and sample_data to build folder
Added jshint

- Removed old rakefile and gemfile
- Removed old expected output test
- Removed everything from the build folder except generated versions of bluebutton.js
- Added .jshintrc for global jshint rules
Merge pull request #39 from robdodson/grunt

Grunt
Removing old sample data, unused doc_server
README updates