pginstaller - pginst: Move translation validation into custom task.

Log Message:
-----------
Move translation validation into custom task.
Fix the fact that our XSD wasn't actually spec compliant, but the vbscript code accepted it :S

Modified Files:
--------------
    pginst/lang:
        lang.proj (r1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/lang/lang.proj.diff?r1=1.1&r2=1.2)
        translation.xsd (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/lang/translation.xsd.diff?r1=1.2&r2=1.3)
    pginst/util/tasks:
        tasks.proj (r1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/util/tasks/tasks.proj.diff?r1=1.1&r2=1.2)

Added Files:
-----------
    pginst/util/tasks:
        validatetranslation.cs (r1.1)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/util/tasks/validatetranslation.cs?rev=1.1&content-type=text/x-cvsweb-markup)

Removed Files:
-------------
    pginst/util:
        validatetrans.vbs
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/util/validatetrans.vbs)