Support for custom image pointer and round arc

[snehas13]

I am planning to use Custom TubeSpeedometer for the attached implementation of speedometer.
Please let me know how to make the arc round at the end and also how to add custom pointer image.

@anastr Please reply at the earliest as we are blocked on this.
If the approach which i am following is incorrect, then please suggest which speedometer should i use to implement the view.

[anastr]

I'd suggest to customize PointerSpeedometer and increase the speedometer width.