- Added drop/add primary key methods to QueryBuilder.php
- Added mysql specific dropPrimarykey method
- Added sqlite specific dropPrimarykey and addPrimaryKey methods
- Added uint testing for dropPrimarykey and addPrimaryKey methods
- Corrected postgresql column types, by adding length and precision

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.

     using different Application instances (consoleApp/ webApp)
mod: TestCase::getParam accepts second param $default=null

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

Added support for scopes defined in AR classes.

finished AR documentation.