[poppler] Annot rendering improvements

[Fabio D'Urso]

The attached patches contain many improvements in Annot rendering (and thus printing).
0001 is a bug fix, to make it possible to hide annotations when printing.
0002 fixes the existing AnnotGemetry::draw method.
0003, 0004, and 0007 implement Annot*::draw methods from scratch.
0005 adds leading line support when drawing AnnotLines.
0006 adds support for typeSquiggly and fixes some bugs that prevented other types from being drawn.

Note on 0007: AnnotFreeText is a box with text inside. This patch only implements basic functionality:
  - it can't print the full range of Unicode characters (in fact it converts to WinAnsi before printing)
  - font is hardcoded. Note that the font resource dict is not written when outputting to PS. This fact results in a invalid font reference in the Tf command. However, font is substituted and a warning is issued in all ps viewers I have at hand

I'll try to fix 0007 to output font res dict tomorrow, but I feel that even at this stage this basic implementation can be useful.
The other patches are final
 		 	   		  
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