Version should support additional components (e.g. labels)

[Cosmin Lehene]

We need to annotate versions with timestamps (e.g. SNAPSHOT) and other markers (e.g. labels).
x.y.z.t-SNAPSHOT-internal or x.y.z.t-SNAPSHOT+internal
Perhaps useful: http://semver.org/ or https://docs.oracle.com/middleware/1212/core/MAVEN/maven_version.htm#MAVEN8905 would