add ability to use an array in multi columns parameters

Fixes #2016: removed ability to declare scopes in ActiveRecord leaving it to ActiveQuery. Changed documentation accordingly.

fixes #1993

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

Appended newlines to every PHP document that did not have a newline as the last character in the file.