ZF-1985: Transparency handling


That would be good to have possibility to set transparency of drawn text/graphics


Here is a link to Martin Hall-May implementation of this feature for fpdf: http://www.fpdf.org/fr/script/script74.php

Please evaluate and categorize as necessary.

This doesn't appear to have been fixed in 1.5.0. Please update if this is not correct.

Please, this feature is a "must have"....


Updating for the 1.6.0 release.