eBird enhancements

This browser extension comprises five independent enhancements or enhancement groups for eBird pages. The five enhancements are:

* Identify flagged checklists
* Trip Report enhancement group
Sort checklists
Copy checklist URLs to clipboard
Download the set of GPS tracks
Export trip report to spreadsheet
* Checklist sharing
* Download GPS track for one checklist
* Download GPS tracks for all checklists

See https://www.faintlake.com/eBird/extension/Enhancements/ for full details.

Three of the four enhancements were previously distributed as separate extensions; now all are grouped together here and the old separate extensions can be uninstalled if you have them. You only need this one extension for all of the enhancements that I provide.