move hosts controller away from AS
Fixes #193 - move hosts controller away from AS
- Remove active scaffold from hosts controller.
- changed default host graphs from one day for up to one week
- added dynamic dropdown boxes for host creation / edit page (e.g. for puppet classes, operating systems etc).
- converted puppet class selection to a template, using it in hostgroups and hosts edit page.
- Renamed puppetgroups to hostgroups for consistency
- Added search option to list, this include search by facts as well