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