Before this fix, the URL wasn't updated in IE8 when navigating into
folders.

This fix makes use of the hash part of URLs to make this work in IE8,
since IE8 doesn't support the history API nor changing the URL without
redirecting.

From now, both the regular query URL "?dir=somedir" and "#?dir=somedir"
will work in both IE8 and non-IE8 browsers.

In IE8, query based URLs are automatically converted to hash URLs upon
page load. The conversion is done on the server side by redirecting the
user to the updated URL.

When loading a page directly using a hash URL in the form
"#?dir=somedir" in IE8, the server doesn't get the hash, so it will not
return any results in that case and rely on ajax to load the first page.

Using delegate might break apps that embed themselves in the files
container. When an app embeds itself and the user clicks a breadcrumb,
it will simply reload the whole browser page.

The recent refactoring for the breadcrumb resizing relies on the "Files"
object which is in the "files" Javascript file.

This fix includes it here as well.

Frontend:
- The files app list now uses ajax calls to refresh the list.
- Added support the browser back button (history API).
- Added mask + spinner while loading file list

Backend:
- Added utility function in core JS for parsing query strings.
- Moved file list + breadcrumb template data code to helper
  functions
- Fixed some file paths in trashbin app to be similar to the files app

IE8 is not happy with the :checked CSS3 selector which causes it to
ignore the whole rule.

Replace it with a more compatible selector.

Conflicts:
	apps/files_encryption/lib/stream.php