Amazon S3 notebook storage for Zeppelin

zeppelin-site.xml

...
<!-- Amazon S3 notebook storage -->
<!-- Creates the following directory structure: s3://{bucket}/{username}/{notebook-id}/note.json -->
<property>  
  <name>zeppelin.notebook.s3.user</name>
  <value>*FOLDER*</value>
  <description>user name for s3 folder structure</description>
</property>

<property>
  <name>zeppelin.notebook.s3.bucket</name>
  <value>*BUCKET*</value>
  <description>bucket name for notebook storage</description>
</property>

<property>
  <name>zeppelin.notebook.s3.endpoint</name>
  <value>s3.amazonaws.com</value>
  <description>endpoint for s3 bucket</description>
</property>

<property>
  <name>zeppelin.notebook.storage</name>
  <value>org.apache.zeppelin.notebook.repo.S3NotebookRepo</value>
  <description>notebook persistence layer implementation</description>
</property>
...