[READY] RESTful routing syntax for UrlManager

removed test param 'appClass' as it does not make sense to configure
application class for all tests, some explicitly need webapp where
some might explicitly need console app.

[READY] Better flexibility for abstract db types

MSSQL seems to support limits for decimal type, so we add a default
limit.

Merge branch 'querybuilder-dynamic-column-types' of github.com:cebe/yii2 into querybuilder-dynamic-column-types

* 'querybuilder-dynamic-column-types' of github.com:cebe/yii2:
  Added phpdoc about precision constraints for abstract db types

Feature was requested in yiisoft/yii#765

fixes #465

\yii\widgets\Menu improvement

[ready]bootstrap tabs widget

[ready]added button group dropdowns