Fixes #13936 - Drop support for legacy browsers

This patch removes various workarounds needed to get legacy browsers to
work. Mostly stuff needed for IE<10, but also some other vendor prefixes
that are no longer needed.

fixes #12914 - update configurations to rails 4.1 structure

this is a simple output after comparing the output of ```rails new foreman```
and updating accordingly.

fixes #2526 Favicon only shows up if foreman is deployed in the root context

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...

fixes #2277 - adds spice html5 support

This also adds a newer version of the web socket proxy (where we
probably need to use an external package instead of vendor it).

we still allow users to use the old XPI based spice client (which would
ensure end to end security as well) via a 'new window' button....

fixes #2222 hostgroup form can be scoped by multiple taxonomys.

fixed test connection for existing compute-resource.

added filter to the multy select component.

new org wizard.

fixes #2033 - Cannot assign a host to an org

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