Add test for rectangle path optimization with non rectilinear pen

This fails on pdf/ps.
pdf: fix rectangle stroke with non rectilinear pen
Add test for paint with alpha and clipping bug

Add test case for https://bugs.freedesktop.org/show_bug.cgi?id=68382

Something has regressed in the recording surface. All the recording
surface based backends lose the alpha from the paint_With_alpha.
ps: remove duplicate /Interpolate from image dictionary

http://lists.freedesktop.org/archives/poppler/2014-January/010748.html
ps: fix imagemask with pattern source failure on some printers

When /PaintProc is invoked the pattern dict is pushed onto the stack.
Ensure this dict is removed.

https://bugs.freedesktop.org/show_bug.cgi?id=69485
font: Generate PDFs with correct font names

Escape PostScript names of loaded fonts. These can not
contain white spaces and delimiter characters when saving
them to a PostScript file or a PDF file.
ps: use setpagedevice to set page size

https://bugs.freedesktop.org/show_bug.cgi?id=73452
ps: cairo_set_page_size does not need to be in eps output
ps: add font DSC comments
type1: strip space from end of font name
cairo svg: Use \n instead of /n in bitmap fonts

Signed-off-by: Uli Schlachter <psychon@znc.in>