Support for Right-Facing Half Radial Gauge

[kaijk]

Feature Request: I was hoping to create two side-by-side vertical half-gauges, the left facing one with startAngle 0, and the right facing one with startAngle 180.

However, the width parameter only seems to trim from the left so it clipped the gauge part of the startAngle 180 gauge instead of its empty half on the left. I couldn't figure out how to make it trim from the left so the gauges would be close to each other.

BTW, I suppose one could also want to create two horizontal half gauges, one with startAngle 90 and the other with startAngle 270 for which it would need to trim from the top.