title: Decoupling ion.rangeSlider grid / tooltip values
body: <p>This seems like a simple enough thing to do. I have a simple slider which goes from 0 to 100 in steps on 25. When using the slider I would like to change the number returned by a string:</p>
  
  <p>0 - Novice
  25 - Beginner
  50 - Intermediate
  75 - Advance
  100 - Expert</p>
  
  <p>However, I can't seem to find a way to decouple the grid value (0 - 100) from the tooltip value returned. </p>
  
  <p>Thanks in advance. </p>
  
  <p>Carlos</p>