Change the scenario name to be more descriptive
Add scenarios for "vX.Y.Z" style version tags
Add Vim::Flavor::Version
Use Vim::Flavor::Version instead
Add specs for Vim::Flavor::Version
Accept "vX.Y.Z" style tags as versions
Accept "vX.Y.Z" style tags in lockfile
Merge branch 'accept-vX.Y.Z-style-tags-as-versions'

Close gh-32.
Bump up version to 1.1.1
Merge branch 'prepare-for-1.1.1'