feat(overmind): add release procedure

Author: christianalfoni

README.md

@@ -1,3 +1,17 @@
 # Overmind
 
-Visit website for more information: [www.overmindjs.org](https://www.overmindjs.org).
+Visit website for more information: [www.overmindjs.org](https://www.overmindjs.org).
+
+## Release procedure
+
+```sh
+$ git checkout next
+$ git pull
+$ npm install # make sure any new dependencies are installed
+$ npm install --no-save nodegit  # needed for "repo-cooker --release"
+$ npm run release -- --dry-run --print-release  # and check release notes
+$ git checkout master
+$ git pull
+$ git merge --ff-only next
+$ git push
+```