2.3/feature psr streams

Progress

* Added useful FieldCollection methods
* Progress on the Form builder
* Progress on Entry model
* Added ability to get all except specified columns
* Added ability to get unformatted attributes directly from an Entry model
`$entry->getUnformattedValue('foo');`
* The beginnings of a more OOP control panel api

##### examples

    Cp\Entries::table('profiles', 'users')->render();

    // or    

    Cp\Entries::table('profiles', 'users')
        ->setColumns(array('display_name', 'dob'))
        ->query(function($query) {
            return $query->where('display_name', '=', 'Monkey'); // customize query
        })->render();