uv3 changing versioning to avoid potential eclipse issues

Our build toolset uses the maven build-helper plugin to convert between maven version conventions and OSGi conventions. That build helper plugin converts 1.2.3-SNAPSHOT to 1.2.3.SNAPSHOT. The hyphen (maven convention) is converted to a period (Eclipse convention). This seems to fall apart somewhat, when working with 1.2.3-alpha-SNAPSHOT - the coverter changes just the first hyphen it finds (left to right scan) to a period, giving for this example 1.2.3.alpha-SNAPSHOT.

There are other problems with this, see https://docs.oracle.com/middleware/1212/core/MAVEN/maven_version.htm#MAVEN400.

To avoid these issues, I'm renaming 3.0.0-alpha-SNAPSHOT to 3.0.0-SNAPSHOT. The readme and announcement will say alpha.