title: Connect sparklyr to remote spark connection
body: <p>I would like to connect my local desktop RStudio session to a remote spark session via sparklyr. When you go to add a new connection in the sparklyr ui tab in RStudio and choose cluster is says that you have to be running on the cluster, or have a high bandwidth connection to the cluster. </p>
  
  <p>Can anyone shed light on how to create that kind of connection? I am not sure how to create reproducible example of this, but in general what I would like to do is: </p>
  
  <pre><code>library(sparklyr)
  sc &lt;- spark_connect(master = "spark://ip-[MY_PRIVATE_IP]:7077", spark_home = "/home/ubuntu/spark-2.0.0", version="2.0.0")
  </code></pre>
  
  <p>from a remote server. I understand that there will be latency, especially if trying to pass data between the remotes. I also understand that it would be better to have the rstudio-server on the actual cluster- but that is not always possible, and I am looking for a sparklyr option for interacting between my server and my desktop RStudio session. Thanks. </p>