add deployment instructions

DEPLOYING.md

@@ -0,0 +1,21 @@
+# Deploying Instructions
+
+These instructions are based on the [instructions](http://central.sonatype.org/pages/ossrh-guide.html)
+for deploying to the Central Repository using [Maven](http://central.sonatype.org/pages/apache-maven.html).
+Note that this is for Spotify internal use only.
+
+You will need the following:
+- The username and password that Spotify uses to deploy to the Central Repository as described in
+the open source manual on the internal wiki.
+- [GPG set up on the machine you're deploying from](http://central.sonatype.org/pages/working-with-pgp-signatures.html)
+
+Once you've got that in place, you should be able to do deployment using the following commands:
+
+```
+# deploy snapshot version
+mvn clean deploy
+
+# make and deploy a relase
+mvn release:clean release:prepare -Prelease
+mvn release:perform
+```