updates UI to bootstrap v2

code smell

WIP rails3 migration

fixes #1232 - unable to assign OS default provisioning templates

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...