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 localization calls to the subnets and the trenda pages.

There are other changes to the common layouts based on simple testing.

fixes #2291 undefined method 'to_a' for 75:String when creating host WITH taxonomy

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 #2222 hostgroup form can be scoped by multiple taxonomys.

fixes #2166 - error when clearing location

changes to taxonomies_controller

clone action, view, tests

fixes #2033 - Cannot assign a host to an org

Now its possible to change Locations / Organizations only via mass assign

fixes #2001 - Changing Loc or Org after compute resource selection give 500 error