Added WriteOptionUI virtual
Stop() now does ~SDR tasks when delegated to plugin, since SDR is no longer destroyed in plugin mode
Added deviceNumber to pebble.ini to disambiguate multiple devices in one plugin
Added deviceNumber to plugin info so we don't have to access deviceInterface
Added ui option form for rtl2832
Lots of changes to support multiple devices in 1 device plugin

RTL2832 support USB and TCP devices