Streamline Files interfaces

Summary:
  - There's no way you can figure out the ID of a file right now. Expose that
more prominently.
  - Put the drag-and-drop uploader on the main page so you don't have to click
through.
  - Restore the basic uploader so IE users can theoretically use the suite I
guess? Added author info to basic uploader.
  - Show author information in the table.
  - Show date information in the table.
  - Link file names.
  - Rename table for filter views.
  - When you upload one file, just jump to it. When you upload multiple files,
jump to your uploads and highlight them.
  - Add an "arc download" hint.

Test Plan: Uploaded single files, groups of files, and files via simple
uploader.
Reviewers: codeblock, jungejason, tuomaspelkonen, aran
Commenters: codeblock
CC: aran, codeblock, epriestley
Differential Revision: 746

src/applications/files/controller/dropupload/PhabricatorFileDropUploadController.php

@@ -37,8 +37,10 @@ class PhabricatorFileDropUploadController extends PhabricatorFileController {
 
     return id(new AphrontAjaxResponse())->setContent(
       array(
+        'id'   => $file->getID(),
         'phid' => $file->getPHID(),
         'html' => $view->render(),
+        'uri'  => $file->getBestURI(),
       ));
   }