Improve README code snippets

Signed-off-by: Chris Aniszczyk <zx@twitter.com>
Merge pull request #1 from twitter/improve-readme-snippets

Improve README code snippets
Make sure grunt-cli and bower is installed

Signed-off-by: Chris Aniszczyk <zx@twitter.com>
Merge pull request #2 from twitter/fix-build

Make sure grunt-cli and bower is installed
Fix version in 'bower.json'

Also add some more ignores.
README should discuss RequireJs dependency