*.sql: Replaced concat_delim() with concat_ws(), which is built-in as of PostgreSQL 9.1 (http://stackoverflow.com/questions/1943433/postgresql-concat-ws-like-function)
*.sql: Replaced concat_delim() with concat_ws(), which is built-in as of PostgreSQL 9.1 (http://stackoverflow.com/questions/1943433/postgresql-concat-ws-like-function)