Merge PR #1393 branch 'yii2-basic-codeception' of https://github.com/Ragazzo/yii2 into Ragazzo-yii2-basic-codeception

* 'yii2-basic-codeception' of https://github.com/Ragazzo/yii2:
  small typo fix
  added readme, changelog, license and composer files.
  added new extension yii2-codeception, modified composer settings
  modified tests according yii2-codeception extension
  added testcase for unit tests, bootstrap files improved, tests inherited from base testcase
  configs fixed and improved
  tests modified, bootstrap added
  colors added
  new entry points for application
  codeception configs, web config modifed for db-settings

Conflicts:
	composer.json

Allow multiple navbars

Changed the navbar target to be based of the widget id and not static.

fixes #1541

Added support for aliases for config files in console command 'message'

Update BaseSecurity.php

prevent call strlen function twice

http://www.hhvm.com/blog/2393/hhvm-2-3-0-and-travis-ci

Disallow indexing backend by default

Backend should be always totally closed for indexing by search engine robots

i18N: View path does not change if language folder exists

More docs for /yii/base/Component.php::trigger()