[LyX/master] Add some postscript and pdf viewers for Unix and Windows.

[Enrico Forestieri]

commit d5210c555a4b51fa73eb447f2d86172185562a11
Date: Sun Jul 13 19:59:31 2014 +0200
Add some postscript and pdf viewers for Unix and Windows.
For Windows: AcroRd32 and gsview (both 32 and 64 bit versions).
For Unix: qpdfview.
Qpdfview is a nice alternative to Okular for KDE users and a superior
alternative to Evince for Gnome users, due to its complete synctex
support. It only depends on Qt libraries for the graphical interface.

Richard, can this be backported to the stable branch?

diff --git a/lib/configure.py b/lib/configure.py
index c8e8267..db2df66 100644
--- a/lib/configure.py
+++ b/lib/configure.py
#
#checkProg('a Postscript interpreter', ['gs'],
# rc_entry = [ r'\ps_command "%%"' ])
- checkViewer('a Postscript previewer', ['kghostview', 'okular', 'evince', 'gv', 'ghostview -swap'],
+ checkViewer('a Postscript previewer', ['kghostview', 'okular', 'qpdfview --unique', 'evince', 'gv', 'ghostview -swap', 'gsview64', 'gsview32'],
rc_entry = [r'''\Format eps eps EPS "" "%%" "" "vector" "image/x-eps"
\Format eps2 eps "EPS (uncropped)" "" "%%" "" "vector" ""
\Format eps3 eps "EPS (cropped)" "" "%%" "" "document,menu=export" ""
\Format ps ps Postscript t "%%" "" "document,vector,menu=export" "application/postscript"'''])
# the MIME type is set for pdf6, because that one needs to be autodetectable by libmime
- checkViewer('a PDF previewer', ['pdfview', 'kpdf', 'okular', 'evince', 'kghostview', 'xpdf', 'SumatraPDF', 'acrobat', 'acroread', 'mupdf', \
- 'gv', 'ghostview'],
+ checkViewer('a PDF previewer', ['pdfview', 'kpdf', 'okular', 'qpdfview --unique', 'evince', 'kghostview', 'xpdf', 'SumatraPDF', 'acrobat', 'acroread', 'mupdf', \
+ 'gv', 'ghostview', 'AcroRd32', 'gsview64', 'gsview32'],
rc_entry = [r'''\Format pdf pdf "PDF (ps2pdf)" P "%%" "" "document,vector,menu=export" ""
\Format pdf2 pdf "PDF (pdflatex)" F "%%" "" "document,vector,menu=export" ""
\Format pdf3 pdf "PDF (dvipdfm)" m "%%" "" "document,vector,menu=export" ""