- added example code for application components
- added missing short description

[ci skip]

Fixed the issue that Object/Component doesn't support using anonymous function as normal property values.

this allows implementing __call() in behaviors

See this forum topic for details:
http://www.yiiframework.com/forum/index.php/topic/46629-invoke-behavior-method-through-php-magic-method-call-dosent-work/

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

Implemented scope support.

added more exception classes.
working on request and response classes.

Finished ExpressionDependency.