NLSR

NLSR builds and passes unit tests with current release candidate for ndn-cxx.

To-do items, courtesy of Davide:

• discuss switching to CalVer over semantic versioning for consistency with other NDN projects
• increase version number in wscript
• write release notes, update docs/release-notes.rst, add entry in docs/releases.rst
• create and push signed git tag
• review draft release on GitHub (including artifacts), adjust notes as needed, publish
• update "current" documentation symlink on docs.named-data.net
• send announcement