Remove <?= from php scripts

[wwalc]

Reported on #fckeditor IRC channel by OZZlE.

When short_open_tag setting is disabled, <?= doesn't work.

<?php echo...

should be used instead.

[alfonsoml]

The patch for #1593 does already include the change for the sampleposteddata.php

It seems that there are no more places the the <?= is used, so I guess that this can be closed when that patch is checked in.

[martinkou]

There are no more <?= in the SVN trunk source code, I think this is fixed?

[wwalc]

#1593 fixed this problem, there are no more short tags (<?) in the FCKeditor trunk. I fixed also fckpackager with [2071].