Added multiselect.js

Added multiselect.js source files, for use within the edit groups page
Modified the default layout

Added blade sections containing all of the styles and scripts to allow
loading custom styles and scripts on a page-by-page basis
Fixed the 'styles' and 'scripts' sections

The styles and script sections were using incorrect syntax "@stop"
rather than "@show"
Refactored footer template

Moved scripts out of container div
Modified group editing page

Loaded in the necessary multiselect files
Changed the multiple select box to show all users, and have the id as
value
Added dependencies to composer.json

Added an asset pipeline to the dependency manager
Added the asset pipeline to providers array

Added the asset pipeline to the providers array to allow the use of the
asset pipeline's command line tools
Set up the asset pipeline

Ran the command line setup for the asset pipeline
Create a config.php files to enable project specific configuration
Revert "Added dependencies to composer.json"

This reverts commit b455999b34a168ca96ce3b1915117205eb954f6a.
Revert "Set up the asset pipeline"

This reverts commit d75cc3e7b34e169437676054aca167d351835652.
Revert "Added the asset pipeline to providers array"

This reverts commit f1723c5f25a79843985b4e9098f4995b53791ed1.
Incorporated multiselect

Added markup and js to incorporate multiselect.js into the group editing
view
Fixed edit group functionality

Fixed the redirects in the update group function
fixed the unique constraint in the update group function