Import Export SystemController

[dsmurl]

Branch - ImportExportSystemController

In this story we will write a importer and exporter of the Sensors, Devices, Rules, and settings for a given SystemController. This will be a first generation and will need adjusting as we develop so we don't need a lot of versioning thought put into it now. Maybe more versioning though in the 4.1. We do however need to include a version number which may be the build number or something like that. Maybe just the major and minor number.