Added hasMethod() to Component and Object class

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/

return false, not null

* 'master' of github.com:yiisoft/yii2:
  Reverted  changeset 595ac6d0
  Fixes #833: added charset to json response.

* 'master' of github.com:yiisoft/yii2:
  Fixes #829: loginRequired now responds with HTTP 403 in case of AJAX or loginUrl is not set (reverted from commit c2c12a90)
  add missing return to module template
  Update module.php
  Fixes #829: loginRequired now responds with HTTP 403 in case of AJAX or loginUrl is not set
  gii form width adjustment.
  Make sure query cloning works as expected.
  Fixed test break.
  Fixes #828: refactored QueryBuilder::build()

- rename FileHelper::mkdir for API consistency
- changed default permission for directories to 775 instead of 777
- added some properties to classes that deal with files to allow control
  over directory permissions.

Fixes #829: loginRequired now responds with HTTP 403 in case of AJAX or loginUrl is not set (reverted from commit c2c12a90)

add missing return to module template

I think according to the framework it should return the render and otherwise the browser will stay blank...

module should extend \yii\base\Module as \yii\web\Module doesn't exist...

module should extend \yii\base\Module as \yii\web\Module doesn't exist...

If this is outdated, then pls just ignore it!

- cleanup API and usage, add documetation link
- introduced @property feature in getter or setter which has precedence
  over @return or @param tag if present

* 'master' of github.com:yiisoft/yii2:
  refactored code.

fixes #822

fixes #811