use speed and cadence to calculate which cog is used.
Add support to new edges, fenixs and forerunners.</p><p> I really like the DataField: CogDisplay, but it has not been updated for a long time. It only support edge 520, edge820 and edge 1000. I wrote the program which have similar function and add support to new edges fenixs and forerunners.</p><p> The function of datafield is display the rear gear with the large crankset and the small crankset at the same time.