Completely overhauling navigation. We're now shipping with a configurable Bootstrap Navigation plugin as standard. Fixes #14.

Signed-off-by: Ben Corlett <bencorlett@me.com>
Merge branch 'master' of github.com:webcomm/magento-boilerplate
Recompiling CSS from last PR.

Signed-off-by: Ben Corlett <bencorlett@me.com>