[Admin Panel] creates the admin panel for users management.
[Devise] adds model for admin.
modifies admins stylesheets
css fix
Deletes unnecesary files and folders
modifies admin controller
modifies routes and install gem 'decent_exposure'
modifies admin panel and adds radio buttons
modifies routes,controller and views for admin panel
modifies model,controllers and views for users validation
modifies admin panel
[admin panel]modifies css
Implements admins layout and partials
modifies layouts and partials
adds screen instructions for first login and fixes bugs of plupload implementation
Adds shortcut to the screen instruction of use.
Merge branch 'admin' of https://github.com/erylopez/InsigniaDev into admin

Conflicts:
	app/assets/stylesheets/application.css.scss
	app/views/layouts/admins.html.erb
Fixes of issues into stylesheet.
adds Vault model and controller
fixes issues into routes