Modify SameGame to use QML Singleton

Converts SameGame to use QML Singleton for storing global settings
data that was previously stored in javascript files. In addition
adds a BlackBerry specific selector to load a different singleton
settings instance.

Change-Id: If511e5efd0e539c764ab70eca4fb0f2874b6240e
Reviewed-by: Alan Alpert <aalpert@blackberry.com>