Add .gitignore

- Ignore Mac OS X network files
- Ignore node_modules folder from grunt plugins
- Ignore .sass-cache folder
Add bower support

- Set up config file to point bower installs to custom directory
- Add jquery and normalize-css packages
Add initial grunt tasks, dependencies

- Add standard package.json with repo information
- Add grunt tasks to watch, connect, sass compile, jekyll compile,
  concat, clean, jshint, uglify js, and css minification