Add gyroscope period
Add gyroscope period

Added gyroscope period :
GATT : 'f000aa5304514000b000000000000000'
sandeepmistry/node-sensortag,rjsteinert/node-sensortag,a3rd/node-sensortag,Lahorde/node-sensortag,beeva-marianmoldovan/node-sensortag,nealjack/node-sensortag