Check if trait was loaded
Fixed YiiBaseTest echo

it echoed Yii version which is not necessary
created StringHelper::basename()

In contrast to php function basename() It that always uses \ and /
as directory separator.
It is needed for use on Classnames that contain namespaces.
Fixes #192
Renamed yii.php -> Yii.php for class, filename consitency

See https://github.com/yiisoft/yii2/issues/123#issuecomment-17657374
Issue #123
Removed static variable from autoload per qiangxue's suggestion
refactoring.
Fixes issue #174: make URL parameters available in $_GET.
Merge pull request #195 from suralc/trait-autoload

Check if trait was loaded
Fixed Yii::importNamespaces() bug.
Merge branch 'master' of https://github.com/yiisoft/yii2
Moved "framework" to "iii".
Updated framework paths in composer.json
Merge branch 'master' of git://github.com/yiisoft/yii2 into 196-add-popvalue-method

* 'master' of git://github.com/yiisoft/yii2:
  Updated framework paths in composer.json
  Moved "framework" to "iii".
  Fixed Yii::importNamespaces() bug.
  Fixes issue #174: make URL parameters available in $_GET.
  refactoring.
  Removed static variable from autoload per qiangxue's suggestion
  Renamed yii.php -> Yii.php for class, filename consitency
  created StringHelper::basename()
  Fixed YiiBaseTest echo
  Check if trait was loaded