Added links to release note URLs.
Added links to release note URLs.

To avoid duplicating change information in different places,
there are now links from NEWS to release notes. In the future,
NEWS entries will become more terse, while detailed information
is found in documentation (manpages) and the release notes.

jeremysalwen/Ecasound-LV2,jeremysalwen/Ecasound-LV2,jeremysalwen/Ecasound-LV2,jeremysalwen/Ecasound-LV2,jeremysalwen/Ecasound-LV2