Update to postgreSQL 9.3.0

Major enhancements in PostgreSQL 9.3 include:
- Add materialized views
- Make simple views auto-updatable
- Add many features for the JSON data type, including operators and functions to extract elements from JSON values
- Implement SQL-standard LATERAL option for FROM-clause subqueries and function calls
- Allow foreign data wrappers to support writes (inserts/updates/deletes) on foreign tables
- Add a Postgres foreign data wrapper to allow access to other Postgres servers
- Add support for event triggers
- Add optional ability to checksum data pages and report corruption
- Prevent non-key-field row updates from blocking foreign key checks
- Greatly reduce System V shared memory requirements

URL:	http://www.postgresql.org/docs/9.3/static/release-9-3.html
Install libpgcommon.a, required by extensions.

PR:	ports/182190
Fix plist

PR:		ports/182489
Submitted by:	antoine
Update PostgreSQL port to 9.3.1

Note that users of the hstore extension on version 9.3 must take an additional,
post upgrade step of running "ALTER EXTENSION hstore UPDATE" in each database
after update.

URL:	http://www.postgresql.org/about/news/1487/

(partial cherry pick from bbd5542)
Merge pull request #139 from reallyenglish/postgresql-9.3.1

Postgresql 9.3.1