Added initial unit testing files for the pgsql driver.
Save point: WIP implementing db schema functionality.
[WIP] RESTful routing syntax for UrlManager

issue #303
Here is the proposal for RESTful routing syntax:
https://gist.github.com/cebe/5674918
Savepoint: WIP implementing columns
Savepoint, implementing fkeys.
Added last insert value to pgsql PDO
Savepoint WIP QueryBuilder!
Added table based sequence.
Removed unused columns.
Merge remote branch 'upstream/master' into pgsql-driver
Fixes issue #472: doc fix.
updated composer script event for setting permissions
Fixes issue #476
Implemented "@app/runtime" alias.
Better flexibility for abstract db types

Feature was requested in yiisoft/yii#765
Added "@runtime" and "@vendor" aliases.
whitespace
Added phpdoc about precision constraints for abstract db types
Merge branch 'querybuilder-dynamic-column-types' of github.com:cebe/yii2 into querybuilder-dynamic-column-types

* 'querybuilder-dynamic-column-types' of github.com:cebe/yii2:
  Added phpdoc about precision constraints for abstract db types
added updated composer script event for setting permissions