Added DOKU_BASE for local target

uses the user interwiki link as profile link

* allowed urlparams
 * added `wiki:users:` as default user profile link

Implements an event which can modify the link below usernames, and the
displayed user name.

When no name supplied, the name of currently logged-in user is used.

localize jQuery UI date picker FS#2912

Added video and audio support

renamed conflicting JavaScript functions FS#2915

FS#2901: Fix lessphp on PHP 5.2.0

Add the original filename to sendFile for Content-Disposition

* origin/PR523:
  Update tpl_getConf() signature to match plugin::getConf()

Translation update (ko)

The regex wasn't properly escaped here which lead to problems when the
path contains backslashes. This is the root cause of the bug reported
at https://github.com/cosmocode/edittable/issues/19

We now use phpversion() instead of php_logo_guid()

Translation update (id)

Translation update (cs)

Update action.php

fix bug that only allows admins any AJAX calls

Translation update (tr)

Needs a check for null now.

In most cases this change will have no effect, but noes the response will use the filename that was originally requested. The downloaded filename can be modified to something different as well. E.g. the siteexport plugin will make use of it.