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

Typo in isNewRecord property of ActiveRecord

Fixes doc block in findWith method of ActiveRelation

Fix urlManager

changed name of ansi switch to --colors
https://github.com/yiisoft/yii2/commit/69cad905dd049be9d9b35d8103cd60591e13c6ae#commitcomment-3168489
issue #33

also naming of formatString -> ansiFormat