fixes #1146

not needed when installed via composer and application config loads
composer extensions correctly

set alias to the correct path as they are not part of the yii framework
directory anymore

issue #1140

now also gets stderr output.

fixes #1140

Proposal for #827 Add ImageValidator

Little explanation on the IP whitelisting

I wasted >1h trying to find out why the debug bar was not shown on my remote staging server. Hopefully this will help other people avoid this mistake...

Fixes #1133: gii controller generator now uses application controllerNamespace as default value for "Controller Namespace"

* 'master' of github.com:yiisoft/yii2:
  doc fix
  Fixes #1134: doc fix.

- refactored replaceNamedArguments.
- ensure gridview message works on all systems.

fixes #1072

fixes #1131

fixes #1132

* 'master' of github.com:yiisoft/yii2:
  Fixes #1115: fixed the issue with PDO boolean value binding with pgsql

Typo in Docs [skip ci]