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
updated composer script event for setting permissions
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
updated deps
Sqlite unit test for abstract db types
Adjusted type map in MSSQL Querybuilder

MSSQL seems to support limits for decimal type, so we add a default
limit.