1. Added some markdown files to explain each tab in the application.
2. Updated some of the data table parameters in the index list to the newest revisions to DataTables.
3. Put the download metadata near the top of the enter metdata tab.
4. Changed how plots are generated, plotted, and downloaded - see code.
5. moved the average raw and normalized calibration panel reflectance graphs to the Calibration Plots page.
6. Moved the reflectance heat map to the Event Plots tab.
7. Tested all of the currently existing download buttons - all seem to work.