Better fix for example: initialize _showScale to "YES", so scale shows by default.
Add WMGaugeViewInnerBackgroundStyleRing, to add a ring around the gauge.  Attributes are "ringWidth" and "ringColor".
Also added "scaleInset" attribute to move the scale inside the ring.
Add "innerCircleFillColor" and "externalCircleFillColor" properties to set the colors of the circles that make up the flat gauge background.
Add properties to customize the color of the needle and needle screw, and enable/disable the needle and needle screw shadow.
Add property to enable/disable the labels on the scale.
Set scaleSubdivisions to an appropriate value if someone tries to set 0 subdivisions.