Basic implementation of watchdog

Dependencies:   ros_lib_kinetic

Revision:
0:975e02a70882
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ros_lib_kinetic.lib	Tue Jun 25 23:31:34 2019 +0000
@@ -0,0 +1,1 @@
+https://developer.mbed.org/users/garyservin/code/ros_lib_kinetic/#a849bf78d77f