Add ensureBehaviors() to detachBehavior*()

Need to add ensureBehaviors() to detachBehavior*().

The intent may be to detach behaviors defined in behaviors().
In the original implementation, if these behaviors() are not yet attached, they can not selectively be detached.

removed app template from framework folder.

Added Newlines

Appended newlines to every PHP document that did not have a newline as the last character in the file.

Var dumper dump call static dump as string

Merge branch 'master' of git://github.com/yiisoft/yii2 into var-dumper-dump-call-static-dump-as-string

Check apc.enable_cli for ApcTestCase unit tests

This way we can extend VarDumper::dumpAsString

fix SecurityHelper description

Fix typos

A couple of obvious typos here

fix assetconverter file extensions change only first time

Fix for UploadedFile

fix log messages collection