Updated CHANGELOG
Phalcon\Forms\Form::hasMessagesFor() should return boolean

Fix #1764
Optimize Phalcon\Forms\Form::getMessagesFor()
Helper for Phalcon\Validation\Message\Group::__construct()
Optimize Phalcon\Forms\Form::getMessages()
Validate parameters in Phalcon\Forms\Form::setEntity()
Optimize Phalcon\Forms\Form::add()
Optimize Phalcon\Forms\Form::render()
Optimize Phalcon\Forms\Form::get()
Optimize Phalcon\Forms\Form::label()
Optimize Phalcon\Forms\Form::getLabel()
Optimize Phalcon\Forms\Form::has()
Bug fix in Phalcon\Forms\Form::remove()
Parameter validation in Phalcon\Mvc\Model\Message\Group::__set_state()
Native iterators for Phalcon\Forms\Form
Native count()
phalcon_maybe_separate_zval()
Implement ArrayAccess and Countable with object handlers
Bug fixes

  * validate parameter type in Phalcon\Validation\Message\Group::appendMessage()
  * update test case for #741
Updated CHANGELOG