Add release notes to RELEASING

Ajay Kannan · Ajay Kannan · commit 6c472d5d8b83 · 2015-12-02T12:49:44.000-08:00
diff --git a/RELEASING.md b/RELEASING.md
@@ -13,7 +13,11 @@ The PR should look something like [#225](https://github.com/GoogleCloudPlatform/
 3. Before moving on, verify that the artifacts have successfully been pushed to the Maven Central Repository.  Open Travis CI, click the ["Build History" tab](https://travis-ci.org/GoogleCloudPlatform/gcloud-java/builds), and open the second build's logs for Step 2's PR.  Be sure that you are not opening the "Pull Request" build logs.  When the build finishes, scroll to the end of the log and verify that the artifacts were successfully staged and deployed.  You can also search for `gcloud-java` on the [Sonatype website](https://oss.sonatype.org/#nexus-search;quick~gcloud-java) and check the latest version number.  If the deployment didn't succeed because of a flaky test, rerun the build.
 
 4. Create a release on Github manually.
-Go to the [releases page](https://github.com/GoogleCloudPlatform/gcloud-java/releases) and click "Draft a new release."  Use `vX.Y.Z` as the "Tag Version" and `X.Y.Z` as the "Release Title", where `X.Y.Z` is the release version as listed in the `pom.xml` files.
+Go to the [releases page](https://github.com/GoogleCloudPlatform/gcloud-java/releases) and click "Draft a new release."  Use `vX.Y.Z` as the "Tag Version" and `X.Y.Z` as the "Release Title", where `X.Y.Z` is the release version as listed in the `pom.xml` files.  In the description section, write brief notes on what has changed.  For an example, see the [0.1.0 release](https://github.com/GoogleCloudPlatform/gcloud-java/releases/tag/v0.1.0).  You can see what has changed by looking through the merged master branch pull requests or by using the `git log` command.  Here is an example of the log command to get non-merge commits between v0.0.12 and v0.1.0:
+
+  ```
+  git --no-pager log v0.0.12..v0.1.0 --pretty=oneline --abbrev-commit | grep -v " Merge pull request"
+  ```
 
 5. Run `utilities/update_pom_version.sh` again (to include "-SNAPSHOT" in the project version).
 As mentioned before, there is an optional version argument.  By default, the script will update the version from "X.Y.Z" to "X.Y.Z+1-SNAPSHOT".  Suppose a different version is desired, for example X+1.0.0-SNAPSHOT.  Then the appropriate command to run would be `utilities/update_pom_version.sh X+1.0.0-SNAPSHOT`.
