protopg - protopg: Added new grammar file, that accept oracle commands

Log Message:
-----------

Added new grammar file, that accept oracle commands like SHOW ERRORS. For now
they parsed and the empty string is returned, since I do not know now if there
are any PG analogous for them. I did this just in order not to have error report
in translation. For exampel SHOW ERROR just outputs more detailed info
about an error.

Modified Files:
--------------
protopg:
ora_parser.tpl.y (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/protopg/protopg/ora_parser.tpl.y.diff?r1=1.2&r2=1.3)
ora_scanner.lex (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/protopg/protopg/ora_scanner.lex.diff?r1=1.2&r2=1.3)

Added Files:
-----------
protopg/grammar_parts:
oracle_commands.part.y (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/protopg/protopg/grammar_parts/oracle_commands.part.y?rev=1.1&content-type=text/x-cvsweb-markup)