Revision 689718

GERONIMODEVTOOLS-507 Ship only one feature that provides v20 and v21 server support
add version and build date to about.html files from build, so we don't have to manually muck with the date each release.
Use one about.html file, not one per plugin, since they're all the same.
Add a pointer to release notes in about.html
update license to cover both server versions
manually update plugin sizes while I was there, since we are close to release.