title: MPAndroidChart: Have one graph mirror the zoom/swipes on a sister graph
body: <p>I have two line graphs that show complementary data over the same time period. Is there any way to send any touch events received by one graph to the other? I essentially want it so that the graphs always show the same viewing rectangle (at least on horizontally). So if a user swipes left 'n' units on the top graph, the bottom graph will automatically scroll left 'n' units to match.</p>