Make a number of administrative types of updates:

- Change the way that we construct the server version number.  This is
  explained in detail at
  https://www.opends.org/wiki/page/TheOpenDSVersionNumber

- Remove the CheckEOLStyle and CheckCopyrightDates ant targets and replace them
  with a single CheckPrecommit target that does both tasks and should be much
  more efficient.  This should prevent out of memory errors on some platforms
  that were experiencing them before.

- Update the build process so that Javadoc generation is no longer part of the
  precommit target.  This has been known to take a significant length of time
  and is unlikely to catch many problems that checkstyle doesn't already
  detect.