UI fixed error in provisioning template, edit page.

UI - more explicit button description for the add child node.

WIP rails3 migration

update the look of host parameters page to look like the smart variables.

New artwork

• dark top-bar
• moved the search box below the tabs line.
• improved the show host page
• added notifications
• Settings tab now changes title based on the active action
• lots of cleanups - fixes #1066, fixes #926, fixes #628 and many other minor changes...

Fixes #378 - Adds support for multiple configuration templates

Configuration templates (Kickstart, preseed, syslinux, gpxe etc) can now
be saved in the database directly.

Each template is associated with valid operating systems (unless if its a
snippet which can rendered via all other templates) and a possible...