New artwork

• dark top-bar
• moved the search box below the tabs line.
• improved the show host page
• added notifications
• Settings tab now changes title based on the active action
• lots of cleanups - fixes #1066, fixes #926, fixes #628 and many other minor changes...

fixes #898 - remove old search leftovers across the app

fixes #806 - Switch to JQuery instead of Prototype JavaScript library

added css grid and converted most pages to use that grid

views cleanup and added more operatingsystems icons

Fixes #366 - Redmine authorization port

This is a major feature which provides RBAC authorization within Foreman
a mental note to myself - never ever work on large commits