Implement Android SharedPreferences for configuration.  This allows much simpler configuration of auto-starting the device at device BOOT, since the BootReceiver can now read its configuration from SharedPreferences.  This also allows the plugin to always add the android permission BOOT_COMPLETED and teh state of @config startOnBoot will determine whether to start the service.  Better error-handling on params/headers config.  Tip-of-the-hat to Nicholas Felmlee for all this