MassOnTime: Converted to be used on BTTF

@russellholt Should we go with this or wait for the maps version?

![screen shot 2014-05-09 at 11 15 19 am](https://cloud.githubusercontent.com/assets/81969/2929735/eecf73ca-d78c-11e3-83d0-579d321afeb4.png)