Making the border to be a styleable setting.

Change-Id: I0b174c3b36a74188481b1390a93154d3d92cc8b9
Allowing the graph view to not just be touchable but to select a value on the X axis and to react (display maybe) on the screen.

Change-Id: Iada1bbbad94e41f4b1f6a9d2362af0b02c6dcb96