Start stying barclamps menu

 * Also removes much of old sass styles
Style barclamp menu
Merge branch 'release/pebbles/master-bootstrap-ui' of https://github.com/kwwii/barclamp-crowbar into release/pebbles/master-bootstrap-ui

* 'release/pebbles/master-bootstrap-ui' of https://github.com/kwwii/barclamp-crowbar:
  Remove link to Online help
  Use placeholder text for group field
  Fix pluralization
Fix up the help navigation and page
Remove bogus crowbar.png

It's actually a HTML file, not a PNG. And of course not used anywhere.