fixes #832 - adds parameterized class support

Credits:
This patch is based on the original work of Olivier Favre
<olivier@yakaz.com> many many thanks!

• import class parameters, and try to understand their types
• support a complex matrix of environments, puppet classes and their...

[UI] Fixed inconsistent tab naming for the initially active tab

[SQL optimizations] - many small optimizations

• Bookmarks have only users, not usergroups
• added caching to the settings table
• removed notice message lookups (we are not really using those)...

fixes #1165 add inherited params display and override option to the host form.

Signed-off-by: Ohad Levy <ohadlevy@gmail.com>

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

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

also fixes #1675

smart vars looks sharper.

fixes #1572

added well to all forms.