pginstaller - pginst: Get list of available locales from system instead

Log Message:
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Get list of available locales from system instead of hardcoding. Patch from Aleksander Kmetec, with some hacking on top.

Move "stolen" MSI includes to a separate file.

Add guid for romanian localization of the backend.

Modified Files:
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pginst/ca:
Makefile (r1.10 -> r1.11)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/ca/Makefile.diff?r1=1.10&r2=1.11)
msi.def (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/ca/msi.def.diff?r1=1.3&r2=1.4)
pginstca.c (r1.66 -> r1.67)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/ca/pginstca.c.diff?r1=1.66&r2=1.67)
pginst/wxi:
guid.lst (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/wxi/guid.lst.diff?r1=1.7&r2=1.8)
pginst/wxs:
dialogs.wxs (r1.39 -> r1.40)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/wxs/dialogs.wxs.diff?r1=1.39&r2=1.40)
pginst.wxs (r1.90 -> r1.91)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/wxs/pginst.wxs.diff?r1=1.90&r2=1.91)
uidata.wxs (r1.10 -> r1.11)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/wxs/uidata.wxs.diff?r1=1.10&r2=1.11)

Added Files:
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pginst/ca:
locale.c (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/ca/locale.c?rev=1.1&content-type=text/x-cvsweb-markup)
locale.h (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/ca/locale.h?rev=1.1&content-type=text/x-cvsweb-markup)
pgmsi.h (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/ca/pgmsi.h?rev=1.1&content-type=text/x-cvsweb-markup)