updates UI to bootstrap v2

fixes #1333 -Destroy vs Delete inconsitent naming

Signed-off-by: Florian Koch <florian.koch1981@googlemail.com>

new UI for foreman

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 #948 - better support for API config_templates api

• url now uses template name as an id, instead of numerical id's.
• index queries now respect search condtions
• added search to the UI part too.
• fine grained json output

views cleanup and added more operatingsystems icons

Fixes #632 - Adds the ability to generate a PXE menu containig
provisioning template and hostgroup combinations on smart proxies

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...