New version scheme that does not depend on SVN rev number:

  MAJOR.MINOR.REV

MAJOR is one hex, and MINOR and REV are two hex each, which can be easily
stuffed into a 32-bit in with some reserved space left over.  The new
version module provides functions for converting for string and int
representations of the version.

New "release" make targets allow for easily incrementing the appropriate
fields on release.