Added Telegesis & Zigbee Wrappers, mapping logic, and plugin interface.

Added Telegesis & Zigbee Wrappers, mapping logic, and plugin interface.

These additions encompass the first pre-release of the plugin
interface.

A unit test, server, client application are also included.

Change-Id: Ia61a01223f611ffc1e38e79b8e3a8317fb3f34cd
Signed-off-by: Mandeep Shetty <mandeep.shetty@intel.com>
Signed-off-by: Thuyen Tran <thuyen.c.tran@intel.com>
Signed-off-by: Joseph Morrow <joseph.l.morrow@intel.com>
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2771
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Patrick Lankswert <patrick.lankswert@intel.com>