Replace Sprite-Icons with FontAwesome

Summary: The removes the sprite sheet 'icons' and replaces it with FontAwesome fonts.

Test Plan:
- Grep for SPRITE_ICONS and replace
- Grep for sprite-icons and replace
- Grep for PhabricatorActionList and choose all new icons
- Grep for Crumbs and fix icons
- Test/Replace PHUIList Icon support
- Test/Replace ObjectList Icon support (foot, epoch, etc)
- Browse as many pages as I could get to
- Remove sprite-icons and move remarkup to own sheet
- Review this diff in Differential

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin, hach-que

Differential Revision: https://secure.phabricator.com/D9052

src/applications/diviner/controller/DivinerMainController.php

@@ -18,8 +18,7 @@ final class DivinerMainController extends DivinerController {
     $crumbs->addTextCrumb(pht('Books'));
 
     $search_icon = id(new PHUIIconView())
-      ->setSpriteIcon('search')
-      ->setSpriteSheet(PHUIIconView::SPRITE_ICONS);
+      ->setIconFont('fa-search');
 
     $query_button = id(new PHUIButtonView())
       ->setTag('a')