fixes #544

renamed Application::handle() to handelRequest()

Name make more sense imo as it is not clear what it handles otherwise.
Removed unused method processRequest form console app and also refactored
console Application to be more similar to web Application.

* 'master' of github.com:yiisoft/yii2:
  Removed unused namespace.
  Put back Yii::getObjectVars() and fixed infinite loop in Object::toArray().
  Recursively return previous exceptions in toArray().
  Added previous exception in toArray().
  Removed headers in ErrorHandler.

fix MigrateController

Added support for different response formats.
Support for error response in different formats.

load ErrorException manually because autoloading them will not work
when error occurs while autoloading a class