Enhancement
Related to #5

Features:

• Includes styles for disabled/readonly, required, valid, and invalid states
• accepts callback functions for:
  • onBlur
  • onChange
  • onClick
  • onFocus
  • onKeyDown
  • onKeyPress
  • onKeyUp
  • onMouseDown
  • onMouseUp
  • onTouchStart
  • onTouchEnd
  • onTouchCancel
• Options are added in an object with format { [key: string]: value: string }
• value is controlled by the parent component (example included)