Fix various bugs reported via automatic bug report.
Initial version of GPX file creation.
More work on GPX export. Now almost finished except for UI and testing exceptions.
Add User Interface for creating GPX files.
Tests for exceptional cases, small fixes.
update gitignore
trying to not track some fixes.
Update Course Appearance dialog to add blend purple color.
Save and load blend purple setting.
Change default purple color to add some cyan and a little yellow.
Update ViewCache code so that it can use blending (not yet fully working yet, though).
Got blending working for on-screen display and PDF creation. Test done for PDF creation but not on-screen display. Still needs work for printing and bitmap export.
Make printing and print previes work with blending.
Rasterize forced on if blending is on.
Rasterize is the default.
Remove some dead code. Make bitmap export work with new map display drawing codepath.
Printing works, with tests.
Make donation link more prominent
Help file changes.
Update sample event, change default purple color a bit.
Add help for create gpx file.