Additional debug function

[Alfonso Martínez de Lizarrondo]

This is a proposal to add a new method in the FCKDebug object to send debug messages to the error console (without an additional window, it's specially useful while debugging in chrome)

[Alfonso Martínez de Lizarrondo]

Proposed SVN patch

[Frederico Caldeira Knabben]

While the proposed idea is good, I don't feel that including further debugging stuff in the code is a good thing. Not because of the debugging benefits, of course, but because we don't need it normally.

Actually, we would do better if we would completely avoid the debug code reaching the compressed files. We should instead load the fckdebug.js separately, if debugging is enabled. I've opened #2043, so this ticket can be considered dependent on that.