Separate the internal version# from dist version#.
This will allows internal version number (from version.txt) to be
different from kit version number (i.e. the version in the
dist tar.gz and directory).
To change the external version #, call ant with -Ddist.version=x.x
Override the buildstring.txt in the voltdbclient jar.
Merge pull request #1681 from VoltDB/release-4.0.1.x-morebuildmagic

Separate the distribution version# from the .jar and .so version#