title: SqlContext is not a member of package org.apache.spark.sql
body: <p>this is my build.sbt file:</p>
  
  <pre><code>name := "words"
  
  version := "1.0"
  
  scalaVersion := "2.10.4"
  
  libraryDependencies ++= Seq(
    "org.apache.spark" %% "spark-core" % "1.3.0",
    "org.apache.spark" %% "spark-sql"  % "1.3.0"
  )
  </code></pre>
  
  <p>sbt.version=0.13.8-RC1</p>
  
  <p>When I compile the program, I have the following error:</p>
  
  <pre><code>    [error] D:\projects\bd\words\src\main\scala\test.scala:8: 
              type SqlContext is not a member of package org.apache.spark.sql
      [error]     val sqlContext = new org.apache.spark.sql.SqlContext(sc)
      [error]                                               ^
      [error] one error found
      [error] (compile:compileIncremental) Compilation failed
  </code></pre>