Adding color opitons for fonts

Overview

Adding handlers for new optional properties in slicesFont, hubFont, and options props.

New Features

• Modified Prop: slicesFont
  -- details: added color property that will globally change the slices font color unless overridden by individual option.fontColor values

• Modifed Prop: hubFont
  -- details: added color property that will globally change the slices font color unless overridden by individual option.fontColor or slicesFont.color values

• Modified Prop: options
  -- Now accepts fontColor property as part of options object that changes the color of the slice text.