Versioning formula.

===================

if (A.major != B.major) return A.major > B.major;

if (A.minor != B.minor) return A.minor > B.minor;

if (A.patch != B.patch) return A.patch > B.patch;

if (A.special == B.special) return 0;

if (A.special == "") return 1;

if (B.special == "") return -1;

return A.special > B.special;

  http://apr.apache.org/versioning.html

                APR's Version Numbering

  http://semver.org/

                Semantic Versioning