on the supplied namespace.

besides via Save or Preview button. This has been successfully tested in FF,
Chrome and IE6/7/8. Opera does not support onbeforeunload, therefore the draft
is kept if the user navigates away from the editor.

Please test this.

This adds a license chooser to the installer. The installer defaults to
the more free CC-BY-SA. CC-NC-BY-SA is still the default in dokuwiki.php
to keep backwards compatibility.

The license array was reordered and Non-Derivative licenses removed
(they don't make much sense for wiki content).

The replacements (@...@) were partially translated and had spaces in
between. Please don't translate the text between @...@.