Fixes #3811 updating to bootstrap 3

fixes #3510 - plugin interface for registering a plugin, updated menu system

fixes #2741 - remove dash from -%> to %>

Fixes #2513 - orgs created in katello do not appear in org filtering

- topbar cache sweeper turned on for api controllers
- a bit of refactoring to get rid of repetitive expire_fragment

new top-bar navigation design and a new login page

upgrade foreman to rails 3.2.13

This commit updates from rails 3.0.x to 3.2.x, main changes include:

• Asset pipline support
• cleanup of existing assets (javascript, css, images)

Users who uses foreman in production, make sure that you now compile
your assets, e.g...