VersionNumber constructor should take Integer arguments, not just Int; added some VersionNumber tests
fix for #2697
Merge pull request #2701 from stevengj/master

bugfix: VersionNumber constructor should take Integer arguments, not just Int
Add symbolic constants for scale!  Clean up diagmm methods.
Clarify MULTIARCH_INSTALL comment
Use symmetrize_conj! not symmetrize! on results of inv for CholeksyDense and BunchKaufman