Implemented the getNegatedPlaceholders

Signed-off-by: Jonas Fagundes <jonas@jonasfagundes.com>
Decoupled multivalued logic from QueryReaderCommand

Now Multivalued query is a normal class not an abstract
superclass

Signed-off-by: Jonas Fagundes <jonas@jonasfagundes.com>
Updated version to 2013.04.03

Signed-off-by: Jonas Fagundes <jonas@jonasfagundes.com>