fixes #1649 Puppet class and environment import works only on the first smart-proxy

fixes #1697 - hostgroup class listing showed all classes regardless of environment

audit as twitter and versions for template.

This also closes #1377 as it offer versions and diff view of the tempates.

it is not ideal, but it should handle the most common case for now,
where we should open other feature requests to support all of the ideas in #1377

minor fixes to host show page

added classes-filter to the puppet classes selection page. fixed the selected classes sort.

also fixes #1675

renamed the parameter queuename to progress_report_id to reflect the fact that
we now have multiple queues in a single progress report.

moved to bootstrap 2.04

fixes #1389 Add bookmark support for pages which are not in the main dialog

smart vars looks sharper.

fixes #1572