Updated uploadify to version 3.2.

Using self-build src/uploader.php script for
security checks on uploaded files and moving them
to the final directory.
Uploadify: Existing files will no longer be overwritten.

Instead, a http error is generated.
Updated footer message (also for release).
uploadify: Using language files for button texts
Bugfix: $no_access global variable was ignored.

So that the global ignore pattern defined in _config/conf.php
was not used and all files have been displayed even if they
match the no_access pattern.
Replaced tabs with spaces on some functions.
Uploadify will show alert boxes with error, if upload failes.
Uploadify prevents files in $no_access global pattern to be uploaded.

It is no longer possible to upload files that match the $no_access
global pattern defined in _config/conf.php.