0.1 -> 0.2
----------
- fn_update_audit_log_trigger_on_table()
- Config tables tb_audit_field and tb_audit_data_type

0.2 -> 0.3
----------
- Lots of fixes for pg_dump/pg_restore and schema qualification
- Added sequences sq_pk_audit_field and sq_pk_audit_data_type as config data

0.3 -> 0.4
----------
- Changed extension name to "cyanaudit" and fixed branding throughout.
- Added check for PostgreSQL 9.1.7 
- Added support for archiving and restoring audit data to/from files.
- Better error checking throughout and during installation.
- Moved log rotation function to an external Perl script to avoid race condition
- Fixed bug with audit_event sequence going out of range
- Added DDL trigger for Postgres 9.3 and above

0.4 -> 0.9.0
------------
- Made Cyan Audit ready for PGXN
- Changed to semantic version number

0.9.0 -> 0.9.1
--------------
- Do not install event trigger on PostgreSQL 9.3.2 or below, as it is not
  handled properly by pg_dump.