redis db backend WIP
Redis concept finished except relations
Redis connection implementation
Finished Redis Connection class
Merge branch 'master' into redis

* master: (117 commits)
  More Model tests
  Better validation rules validity check
  Some tests for Model
  A bit more friendly behavior for unsetting a model attribute
  User WIP.
  Fixed Model::getFirstErrors()
  Finished AccessControl.
  Finished HttpCache.
  User WIP
  line ending fix.
  refactoring cache and db references.
  Fixed session bug.
  Finishes flash feature.
  refactored url creation shortcut method.
  HttpCache WIP.
  Finished AccessControl and HttpCache.
  Finished PageCache.
  finished fragment caching.
  fragment cache WIP
  bug fixes.
  ...
Redis active record data storage implementation

insert update delete
implemented redis AR ActiveQuery and find()
Merge remote-tracking branch 'origin/master' into redis

* origin/master: (104 commits)
  Fixed typo in query builder and reverted changes to DbCache.php
  added note about enabling APC cache for CLI
  more assertions for cache test
  fixed dbcache multiget
  fixed Html test under Windows (line endings)
  fixed DB quoting typo
  create a webapp in test bootstrap
  updated expected exception message
  Added a basic app.
  initial implementation of asset command.
  script WIP
  script command WIP
  Fixed bug in yiic.php. Refactoring AssetConverter.
  adjusted default app layout
  refactoring and documentation for asset/script management.
  Finished asset converter.
  removed unnecessary code, added comment about displaying errors
  better handling of errors during rendering an error
  safer exception rendering
  turn asset manager into a getter.
  ...
Redis Insert, Update, Delete and Find is ready and roughly unit tested

relations are not working yet
Redis cache implementation
Merge branch 'master' into redis

* master: (27 commits)
  form wip
  form wip
  form WIP
  script WIP
  Minor change about twig alias.
  Added Controller::populate().
  Added bootstrap. form WIP
  form wip
  form wip
  Refactored UrlManager.
  refactored AccessControl
  activeform WIP
  Removed the $value parameter from radio and checkbox.
  Support alternative URL rule syntax.
  Support default standard component class.
  updated view renderers docs
  activeform wip
  Refactored view renderers.
  updated view renderers docs
  refactoring activeform.
  ...
testing and fixing RedisCache
Added note to ApcCacheTest

testExpire is failing on PHP 5.3.10
added missing init() method to Cache class
documentation and code style fixes
better php doc for redis Connection::executeCommand
redis cache php doc grammar fix
Merge branch 'master' of github.com:yiisoft/yii2 into redis

* 'master' of github.com:yiisoft/yii2: (87 commits)
  Added dirty attribute description.
  Fixed doc about renderers.
  Finished the initial draft of upgrading instructions
  Fix attaching behavior via config
  Changed default value of View::renderers.
  Fix attaching behavior via config
  Menu WIP
  upgrading instructions WIP
  Refactored Breadcrumbs.
  Fixes issue #54: Implemented Breadcrumbs.
  Added Breadcrumbs.php
  Fixes issue #134
  Rollback word consistencty over entire codebase (ref. #139).
  Add ensureBehaviors() to detachBehavior*()
  Fixes issue #124.
  code reorganization fix.
  reorganized app code. removed app template from framework folder.
  Fixes issue #128.
  Fixes issue #124.
  Add Newlines
  ...

Conflicts:
	tests/unit/framework/caching/ApcCacheTest.php
Merge branch 'master' into redis

* master: (108 commits)
  fixed indentation in test files
  cleanup tests
  Travis-CI build status.
  CS fixes.
  CS fixes.
  Change magic property to normal method. (Thanks to @maxlapko.)
  CS fixes.
  Fixed duplicated merge.
  Fixes issue #50: implemented pager widgets.
  fix: remove pointless unset
  remove fix for unset timezone from bootstrap app
  mod: don't use ArrayHelper to avoid loading another class during every request
  better have timezone fix in application
  Add exception classes hierarchy UML diagram.
  Initial Gettext support.
  RBAC sql files identation fix
  RBAC sql files
  DbManager some Db fields renaming
  DbManager code style fix + right Exception type fix
  Unit tests fix
  ...

Conflicts:
	tests/unit/framework/caching/ApcCacheTest.php
	tests/unit/framework/caching/CacheTest.php
moved classes from framework -> yii