Add maintainers guide

maintainers-guide.md

@@ -0,0 +1,35 @@
+## Octoparts Maintainers' Guide
+
+### Versioning Policy
+
+```
+"{server-major}.{server-minor}.{client-minor}"
+```
+
+When the "{client-minor}" is zero, version should be "{server-major}.{server-minor}".
+
+### Release
+
+#### Required
+
+- Sonatype release account
+- $HOME/.sbt/0.13/sonatype.sbt
+
+``` scala
+credentials += Credentials("Sonatype Nexus Repository Manager", "oss.sonatype.org", "xxx", "yyy")
+```
+
+- $HOME/.sbt/0.13/plugins/gpg.sbt
+
+```scala
+// Use latest version
+addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.0.0")
+```
+
+#### Operations
+
+- Run `git flow release start/finish "{full-version}"`
+- Run `./scripts/publish_libs.sh`
+- Use `sbt sonatypeRelease` from `sbt-sonatype` plugin or access sonatype console (https://oss.sonatype.org/)
+- Set version as "{next-version}-SNAPSHOT" on develop branch
+