New checks for proper PG configuration and some PG 7.1 vs. PG 7.2 changes in postgresql.sql (which now checks at varies its behavior according to the version being run).
1. Added a check that PG was initdb's with the collation order for characters that we expect.
2. Jon added a "sql/common" directory for the insert statements which load data for acs-references, so I added a new datamodel type "common" to the APM.
3. Created a new db API routine that returns true if a given db_type is compatible with the current RDBMS.
4. Added a workaround for a PL/pgSQL "execute" bug in acs-workflow (other cases had been fixed previously by others but this one was missed)