Implemented gradient calculation
Use moving average to smooth out gradients
Support Bar charts
Draw Gradient Histogram
Gradient Adjusted Speed calculations
Download generated gpx file
Split index into html, css and js
Corrected indentation
Only show sections (and headings) as needed
Correct Gradient Graph
Correct display of gradient display
Reworked functions to make more multiple friendly
Enclosed (almost) all in closure
Added selection box
Allow switching between loaded tracks