Add a script which creates and tags a release of a board

[mithro]

There is an attempt to create such scripts at the following locations;

• https://github.com/timvideos/HDMI2USB-TOFE-adapters-and-risers/blob/master/male-to-male/release.sh
• https://github.com/timvideos/HDMI2USB-TOFE-adapters-and-risers/blob/master/left-angle/release.sh
• https://github.com/timvideos/HDMI2USB-TOFE-AXIOM-adapter/blob/master/board/release.sh
• https://github.com/im-tomu/tomu-hardware/blob/master/release.sh