[maven-release-plugin] copy for tag pyrolite-5.1

[maven-release-plugin] copy for tag pyrolite-5.0

release notes

[maven-release-plugin] copy for tag pyrolite-4.30

Merge pull request #69 from adamsitnik/bugFix

make sure hash sets are handled properly, fixes #68

updated serpent version to 1.29 so we get the signed one of that as well

removed no longer needed nuspec file

[maven-release-plugin] copy for tag pyrolite-4.23

[maven-release-plugin] copy for tag pyrolite-4.22

[maven-release-plugin] copy for tag pyrolite-4.21