title: doing spark-shell with mlib, error: object jblas is not a member of package org
body: <p>In spark-shell, when I exectue <code>import org.jblas.DoubleMatrix</code>, it will throw "error: object jblas is not a member of package org" on the RHEL.</p>
  
  <p>Actually, I googled about "jblas" and installed "gfortran" from <a href="https://gcc.gnu.org/wiki/GFortranBinaries#MacOS" rel="nofollow">https://gcc.gnu.org/wiki/GFortranBinaries#MacOS</a> on my mac pro.</p>
  
  <p>My spark version is spark-1.4.0-bin-hadoop2.6.tar or spark-1.5.1-bin-hadoop2.6.tar, which is download directly from the official website, it's to say that I didn't build from the source code.</p>