versioning scheme

[nschloe]

SEACAS's versioning scheme set the SEACAS_VERSION string incorrectly. It is really composed of major and minor version. Compare Trilinos:

SET(Trilinos_VERSION 12.5)
SET(Trilinos_MAJOR_VERSION 12)
SET(Trilinos_MAJOR_MINOR_VERSION 120500)
SET(Trilinos_VERSION_STRING "12.5 (Dev)")

Besides, a YEAR.MONTH scheme seems to be in place. This is probably to immediately recognize if a version is outdated or not.

However, this approach has flaws. One obvious shortcoming is that you cannot make two releases shortly after one another. More importantly, though, SEACAS is missing out on the semantic meaning of major and minor versions. Typically, a major version change indicates an API change, a minor version indicates that functionality has been added in a backwards-compatible way.

[gsjaardema]

Changed. The cmake-built version has been deemed to start at 2.0