title: Cannot compile "dot" function with Breeze
body: <p>I can't get the dot function to compile with Breeze in Scala.</p>
  
  <p>The following code :</p>
  
  <pre><code>val test = DenseMatrix((1.0,2.0))
  val test2 = DenseMatrix((3.0),(4.0))
  val test3 = test dot test2
  </code></pre>
  
  <p>gives me the following error :</p>
  
  <pre><code>could not find implicit value for parameter op: breeze.linalg.operators.BinaryOp[breeze.linalg.DenseMatrix[Double],breeze.linalg.DenseMatrix[Double],breeze.linalg.operators.OpMulInner,That]
  val test3 = test dot test2
                   ^
  </code></pre>
  
  <p>I am using IntelliJ IDEA 13.0.2, scala-compiler:2.10.2, Breeze "0.7-SNAPSHOT"</p>
  
  <p>Any idea on how to get the dot product working?</p>