set application timezone early in application constructor, set default of UTC if no timezone is configured at all (not in app config nor in php.ini)

Enhance ArrayHelper with popValue method

Added and resolved Sqlite tests #15.

* '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

Check if trait was loaded

See https://github.com/yiisoft/yii2/issues/123#issuecomment-17657374
Issue #123

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

it echoed Yii version which is not necessary

[Please Review before merge] Fixed static in signature error

Fix $schemaMap declaration for Mssql driver