Update secure_downloads.rst

Enable mod_xsendfile in apache configuration
Merge pull request #431 from amorce/patch-1

Update secure_downloads.rst
Remove old versions of jquery and jquery-ui.

Filer does not include the old jQuery file, nor does it use any of the
functions from jQuery-ui file is incompatible with newer versions of
jQuery and causes errors when admin centers have newer versions of
jQuery, so it should be removed.
Fix mismatched double quotes in filer admin templates
Merge pull request #434 from aptivate/fix_mismatched_quotes

Fix mismatched double quotes in filer admin templates
Clarify static files
Merge pull request #437 from nephila/feature/staticdoc

Clarify static files
Add the owner_search_fields option to FolderAdmin.

In order to make it easier to work with custom User models, I have added
an owner_search_fields option to the FolderAdmin class, which

  1.  Allows users to declare which search fields they want.
  2.  Attempts to discover which fields are available on the User model
      and using those.

This makes it a lot easier to avoid errors when there are custom User
models.
Allow directory_listing template to be extended easier.

 * Add `object-tools` block similar to how change_form in django-admin works
 * Allow the directory_listing template from FolderAdmin to be overwritten

Overall this allows to add custom actions, e.g to link to a custom form
in the folder admin.
Add object-tools-items
Mimics django  MultipartParser in handle_upload
added missing unlocalize filters
Merge pull request #444 from jrief/unlocalize-fixes

added missing unlocalize filters
resolve admin app url via tag
Merge pull request #442 from ollb/bugfix/in-memory-uploads

Mimics django MultipartParser in handle_upload
Merge pull request #432 from fusionbox/remove-jquery-ui

Remove old versions of jquery and jquery-ui.
Merge pull request #433 from fusionbox/owner_search_fields

Add the owner_search_fields option to FolderAdmin.
Experimental support for django 1.7
Fix tests
Fix travis