Adding an IoTivity/Zigbee sample server

Adding an IoTivity/Zigbee sample server

Added functionality for the IoTivity/Zigbee server.  Added file
for addition of the client.  Changed the PluginStart to have the correct
parameters.  Corrected SConscript to properly include the IoTivity
logger and CSDK.

Change-Id: I20aca3403c6a0a1e198fdb337a6affe13c389417
Signed-off-by: Erich Keane <erich.keane@intel.com>
Signed-off-by: Joseph Morrow <joseph.l.morrow@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2122
Reviewed-by: Joseph Morrow <joseph.l.morrow@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2767
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Patrick Lankswert <patrick.lankswert@intel.com>