Converted CRLF to LF. Added gitattributes file.
Forcedly set file type by extension.
Adjust for test integration.
Merge pull request #573 from bio/normalize-repo

Converted CRLF to LF. Added gitattributes file.
Added functional tests for the basic app.
Merge branch 'master' of github.com:yiisoft/yii2
Fixes issue #579: AccessControl deny rule by default
Added Formatter::nullDisplay.
Added Html::ol() and Html::ul()
cleanup.
encode checkbox and radio list by default.
Added itemOptions for Html::ol
Added Model::load(). Added Controller::refresh() and redirect().
Added Model::loadMultiple() and validateMultiple().
debug toolbar WIP
Improved Json::encode() security.
Enhanced ArrayHelper::toArray()
Fixed basic layout.
Removed unused code.
Fixes issue #588: Added afterValidate to ActiveForm.