New branch to implement time difference functionality when two seperate track points are selected.
When you click near a trackpoint it now marks it but only when you are near. Need to fix this.
Fixed bug where time markers only displayed when mouse was near.
Added lightweight version of how the time differeance functionality will work.
Time differance comparisons now have there own gray box that appears on the left of the point.
Time differance markers now change the color of the SimpleLinesMarker (track route) that is located between them.
Gave colors variables to make them more dynamic.
Merged time differance functionality into project. Users can now see the ellapsed time between two trackpoints by clicking them.