This patch is prerequisite for patches no.2 and 3

Includes pg_scanner.

File name                                                     Changes
-------------------------------------------------------------------------------------------------
acinclude.m4                                                  apple-darwin support
pgadmin/Makefile.am                                           pg_scanners support
pgadmin/db/keywords.c                                         added suffix '_pgadmin' to ScanKeyword, ScanKeywordLookup, NumScanKeywords
pgadmin/include/parser/keywords.h                             PostgreSQL git HEAD src/include/parser/keywords.h
pgadmin/include/parser/keywords_pgadmin.h                     pgadmin original keywords.h
pgadmin/include/parser/module.mk                              new file keywords_pgadmin.h
pgadmin/include/utils/module.mk                               new file pgadminScanner.h
pgadmin/include/utils/pgadminScanner.h                        pg_scanners pg92 header file
pgadmin/pg_scanners/module.mk                                 pg_scanners makefile fragment
pgadmin/pg_scanners/pg92/README                               pg_scanners pg92 README file
pgadmin/pg_scanners/pg92/mbutils.c                            PostgreSQL git HEAD src/backend/utils/mb/mbutils.c
pgadmin/pg_scanners/pg92/module.mk                            pg_scanners pg92 makefile fragment
pgadmin/pg_scanners/pg92/pgadminScanner.c                     pg92 scanner base interface for scan.c
pgadmin/pg_scanners/pg92/pgadminScannerCommon.c               pg92 scanner common code
pgadmin/pg_scanners/pg92/scan.c                               PostgreSQL git HEAD src/backend/parser/scan.c
pgadmin/pg_scanners/pg92/scan.l                               PostgreSQL git HEAD src/backend/parser/scan.l
pgadmin/pg_scanners/pg92/scansup.c                            PostgreSQL git HEAD src/backend/parser/scansup.c
pgadmin/pg_scanners/pg92/src/backend/parser/92/parser/gram.h                build/src/backend/parser/gram.h
pgadmin/pg_scanners/pg92/src/backend/parser/keywords.c        PostgreSQL git HEAD src/backend/parser/keywords.c
pgadmin/pg_scanners/pg92/src/backend/parser/kwlookup.c        PostgreSQL git HEAD src/backend/parser/kwlookup.c
pgadmin/pg_scanners/pg92/src/backend/utils/mb/encnames.c      PostgreSQL git HEAD src/backend/utils/mb/encnames.c
pgadmin/pg_scanners/pg92/src/include/mb/pg_wchar.h            PostgreSQL git HEAD src/include/mb/pg_wchar.h
pgadmin/pg_scanners/pg92/src/port/chklocale.c                 PostgreSQL git HEAD src/port/chklocale.c
pgadmin/pg_scanners/pg92/src/port/pgstrcasecmp.c              PostgreSQL git HEAD src/port/pgstrcasecmp.c
pgadmin/pg_scanners/pg92/wchar.c                              PostgreSQL git HEAD src/backend/utils/mb/wchar.c
pgadmin/utils/misc.cpp                                        add suffix '_pgadmin' to ScanKeyword, ScanKeywordLookup, NumScanKeywords