Log Message:
Update poppler, poppler-glib and poppler-qt to 0.5.1.

This is a development version but is needed to update evince to 0.5.2,
which is part of GNOME 2.14.0.

Release 0.5.1

	- Support for embedded files.
	- Handle 0-width lines correctly.
	- Avoid external file use when opening fonts.
	- Only use vector fonts returned from fontconfig (#5758).
	- Fix scaled 1x1 pixmaps use for drawing lines (#3387).
	- drawSoftMaskedImage support in cairo backend.
	- Misc bug fixes: #5922, #5946, #5749, #5952, #4030, #5420.

Release 0.5.0

	- Font matching code for non embedded fonts now use fontconfig
          instead of hard coded list of fonts.
	- Merge in Xpdf 3.01 changes.
	- Add command line tools from Xpdf.
	- Make install of Xpdf header files ./configure'able.