New Python Django application default to PBKDF2 with SHA256 as a
password mechanism. This adds support for that mechanism in our
password hasher class. This will be needed in the tests for the new
PDO auth plugin.

this was an accidental commit to master

This reverts commit f7f7fb6c.

This introduces a mechanism to override what happens when a media item
is selected in the media manager popup by providing a callback name in
the URL. The default implementation just does what
dw_mediamanager.insert did before and calls insertTags()

Plugin translation #1

autor duplicated + < and > fixes.

* contributors duplication
* adding myself to the contributors' list
* typo

* Created two new options to enable or disable the editing of the display name or the email address in Active Directory. This will allow for the admin to turn the edit feature off if it is not desired that the user could edit their attributes or to prevent errors in case AD does not permit the user to update these attributes.

Updated a word wrongly written on spanish

This change adds a new class to the quicksearch's <form>
element while the quicksearch is running. This is to
make it easier to style the form, e.g. with a throbber gif
in the search box, to indicate that something is happening.
For slow connections, it is sometimes not apparent that
waiting for a few seconds will present the user with a list
of matching pagenames.

The new 'searching' class is added just before the POST
request is sent, and cleared both on successful completion
and when the search box is cleared.