added and refined A TON of new features, including:

- set the mouseover icon on the entire SVG area to be a crosshair instead of a regular mouse arrow
- adjusted the sizing and spacing of the lower visualizations to make them more spread out across the entire main visualization width
- added the ability to click a rider race line to show their information on the detail panel and lower graphs (pre-existing functionality) but then click the same line again to remove the rider detail panel and lower visualizations (new functionality)
- added the ability to "clear" a selected rider by clicking a link on the filtering menu on the left hand side
- changed the look & feel of the fonts across the visualization (new custom Futura font)
- changed the look & feel of the race class selection menu items (left hand panel)
- added the ability to filter on multiple race classes at once, and also selectively turn on/off filters (no need to refresh the page anymore)
- added race class tooltips showing information on each race class when you mouse over a race class
- adjust the opacity of currently shown and currently hidden race class lines (hidden race classes will have their race class menu flter item appear more transparent)