New release header

src/build/release/release-body-header.md

@@ -1,6 +1,5 @@
-With this Release, we continue to refine our automated release mechanism.
-Please check our [Good Git Practices](https://github.com/qudt/qudt-public-repo/wiki/GoodGitPractices) page for some changes on how to submit contributions, including some new workflows available to make things easier for you.
-Please read our updated README.md file, especially the [Installation instructions](https://github.com/qudt/qudt-public-repo#installation-instructions), for many of the details.
+In addition to the many improvements listed below, please note that in the near future (possibly February or March) we will be releasing Version 3.0 of QUDT. This could be a breaking change for your applications, since some of you may be using the versioned graph URIs that include  "2.1". Moving forward, those will include "3.0", but of course the un-versioned graphs will always resolve to the latest version. So, for example, if you use the owl:imports mechanism, your application could import http://qudt.org/2.1/vocab/unit if you want to stay with 2.1, http://qudt.org/3.0/vocab/unit if you want to explicitly migrate to the new Release, or http://qudt.org/vocab/unit if you want to always get the latest Release.
 
-We hope this does not create too much of an incovenience. We invite you to submit GitHub Issues with any problems you encounter.
+In Release 3.0, we will be removing all the deprecated entities that have accumulated to date. They all contain the triple:
 
+\<entity\> qudt:deprecated true