* master:
  Fixes #1248: url manager didn't handle array parameters well.
  travis: speed up composer
  fixes #1306
  fixed travis and composer issue
  fixed array helper test
  fixed Sort test
  some clarification on model docs
  fixed Sort::params to be retrieved from Request instead of $_GET
  revokeAll() implementation for PhpManager
  revokeAll() implementation for DbManager
  added abstract function revokeAll()
  indentation fix
  fixes #1303: Security::decrypt now returns null w/o error when null is passed as $data
  Added link to new RBAC page
  added link to forum thread
  Basic information about RBAC
  RBAC documentation
  added revokeAll() test
  refactored redis AR Query::scalar()

Conflicts:
	.travis.yml

implements #563 - revokeAll()

for consistency with paginiation

Added link to new RBAC page

Basic documentation about RBAC

* master: (59 commits)
  Refactored hasMany and hasOne so that they support cross-DBMS relationship.
  removed unused asset.php files
  fixed composer.json autoload pathes
  fixed c&p error
  allow installing yii2-dev and get the Yii.php file in the same place
  updated dev composer.json dependencies
  added composer.json for yii2-dev package
  fixed broken UniqueValidator
  removed call to nonexistsend property
  cleanup redis AR
  refactored Model and redis AR to allow drop of RecordSchema
  refactored redis AR to relect the latest changes
  "yii\swiftmailer\Mailer::createSwiftObject()" simplified.
  fixed empty result in findByPk list
  fixed problem with not closed transaction in deleteAll()
  fixed broken test
  apply changes to db\AR -> redis\AR
  added dependency in db\AR -> redis\AR needs to be refactored later
  redis AR cleanup
  ensure atomicity of operations
  ...

Conflicts:
	tests/unit/data/config.php

[WIP] Redis ActiveRecord

also removed composer plugin and added it to requirements
this way the plugin is recognized by composer. would not work otherwise.

setting the repo type to yii2-extension also allows us to run composer
plugin and let it handle the extensions in this package