upgrade foreman to rails 3.2.13

This commit updates from rails 3.0.x to 3.2.x, main changes include:

• Asset pipline support
• cleanup of existing assets (javascript, css, images)

Users who uses foreman in production, make sure that you now compile
your assets, e.g...

Add gettext calls to the locations pages and the user pages.

These pages provide examples for using single translations:

_("Here is a simple")

single substitutions:

_("I like %s") % "pie"

and complex ones:

_("%{character"} should %{action}") % {:character => "Jar Jar Binks", :action => "be erased"}

fixes #2269 - Add gettext framework to foreman.

This patch adds a gettext based localization framework to the Foreman. This is done by adding the fast_gettext and gettext_i18n_rails gems along with their depdencies. An example translation is done to the login page and the users controller....

add gravatar to users index

resize puppet calss form, parameter tab, left tabs size.

added search puppet class parameters.

reorg in the user and settings top menus.

Add organization and location to foreman.

This feature allows foreman to provide multi location, multi tenant and
multi organizations capablities.

the idea is that resources within foreman (e.g. hosts, subnets, users,
environments etc) can belong to one or more locations and organization,...

fixed hat location on login screen.

fix minor css classes declaration.