Added initial unit testing files for the pgsql driver.
Save point: WIP implementing db schema functionality.
Savepoint: WIP implementing columns
Savepoint, implementing fkeys.
Added last insert value to pgsql PDO
Savepoint WIP QueryBuilder!
Added table based sequence.
Merge remote branch 'upstream/master' into pgsql-driver
Added foreign keys and cleanup internal pg types
Merge remote branch 'upstream/master' into pgsql-driver
Fixed several formatting issues. Refactored == null to is_null == '' to empty(...)
Refactored types to be compatible with 1.1
Removed commented and unused pgsql datatype mappings.
Removed custom pgsql PDO and added defaultSchema as public property.
Removed false exception catching.
Merge pull request #505 from gevik/pgsql-driver

Pgsql driver implementation (update 4)