IdP version in the code

[Tom Zeller]

> I'll try checking this in and if it breaks I'll revert the Version code
> for the time being.

Just fixed a missing trailing slash in the manifest creation in the POM.

But ... int <major>, <minor>, and <micro> version numbers won't work
for a version like "3.0-SNAPSHOT" or "3.0.0-alpha2". How about we skip
the regex and parsing of the "Implemenation-Version" and just return
it unmumged ? In other words, delete the MAJOR_VERSION, MINOR_VERSION,
and MICRO_VERSION fields and the regex which parses them.