Document release process

CONTRIBUTING.md

@@ -0,0 +1,6 @@
+Release process
+---------------
+
+    npm outdated --depth 0          # See if you can upgrade any dependencies
+    npm version [major|minor|patch] # Update package.json
+    npm publish                     # Tag repo and publish npm package

package.json

@@ -30,6 +30,7 @@
     "mocha": "~1.21.4"
   },
   "scripts": {
-    "test": "mocha test/* --reporter spec"
+    "test": "mocha test/* --reporter spec",
+    "postpublish": "git push && git push --tags"
   }
 }