Update generation scripts for release and version

[pcantera]

@pcantera commented on Tue May 22 2018

Once implemented "goreleaser" tool, i,t's a must to evaluate the need for "release.sh" / "utils/version.sh" files.

If it is really a need, they have to be updated and support Alpha, Beta and Release candidates prior to generate the stable release (RTM).

Otherwise, they should be removed

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