#1 PDFFilter wrong text vertical position

[José Mejuto]

PDFFilter always align text to the base of the bounding box, instead to the top of the bounding box. So a text that looks like this in a report:
----------------
ABCDEFG

----------------

Is rendered by the PDF filter as:

----------------

ABCDEFG
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The attached patch fixes it.

[José Mejuto]

Fix PDF text vertical position

[Luiz Camara]

I will do a research to see the best option to handle all alignment options