Fixes #1647: Changed the default CSS class of error block to be `error-block`
improved traceability of errors thrown in toString() methods
i18n docs for view
typo fix
Merge pull request #1728 from Ragazzo/i18n_docs_view

I18n docs view
debug module request panel improved
gii index view template: make sure create link is split into words
SREG and AX param merging order at OpenId::buildAuthUrl() changed.
Refactored imagine extension.
doc fix.
OpenId::buildAxParams() fixed to add "openid.ax.required" parameter if required attributes are not empty.
Issues #66 and #1710 added to CHANGELOG
Merge branch 'master' of github.com:yiisoft/yii2
debug module config panel improved
removed unnecessary method
bug fixes.
Doc comments at "yii\authclient\widgets\Choice" extended.
Documentation for "authclient" extension has been extended.
Merge branch 'master' of github.com:yiisoft/yii2
doc fix.