* 'master' of github.com:yiisoft/yii2:
minor doc fix.
minor doc improvement.
Add echo into docs for link pager
Update migration.md. Fix missed quotes
handle array in importNamespaces.
import namespaces.
import namespaces.
renamed autoload to classmap.
Added autoload command.
Rewording
Added readme and license files to extensions.
fixed the "only" option for FileHelper::findFiles()
Added Query::indexBy
Improved FileHelper::filterPath()
Enhanced file options for FileHelper.
Fixed locale command.
