title: NoClassDefFoundError => ClassPath$JavaContext when using play start
body: <p>I've made a little Scala, Play2.0.2 application.</p>
  
  <p>It works fine when i use <code>play run</code> command, but when i use <code>play start</code> or <code>play clean compile stage + target/start</code>, when trying to do a MongoDB insertion with Casbah/Salat, i get the following stack:</p>
  
  <pre><code>[info] application - Can't create user 
  java.lang.NoClassDefFoundError: scala/tools/nsc/util/ClassPath$JavaContext
      at scala.tools.scalap.scalax.rules.scalasig.ScalaSigParser$.scalaSigFromAttribute(ScalaSig.scala:35) ~[scalap-2.9.1.jar:na]
      at scala.tools.scalap.scalax.rules.scalasig.ScalaSigParser$.parse(ScalaSig.scala:38) ~[scalap-2.9.1.jar:na]
      at com.novus.salat.util.ScalaSigUtil$$anonfun$parseScalaSig0$2.apply(ScalaSigUtil.scala:73) ~[salat-util_2.9.1-0.0.8-SNAPSHOT.jar:0.0.8-SNAPSHOT]
      at com.novus.salat.util.ScalaSigUtil$$anonfun$parseScalaSig0$2.apply(ScalaSigUtil.scala:73) ~[salat-util_2.9.1-0.0.8-SNAPSHOT.jar:0.0.8-SNAPSHOT]
      at scala.Option.map(Option.scala:133) ~[scala-library.jar:na]
      at com.novus.salat.util.ScalaSigUtil$.parseScalaSig0(ScalaSigUtil.scala:73) ~[salat-util_2.9.1-0.0.8-SNAPSHOT.jar:0.0.8-SNAPSHOT]
  Caused by: java.lang.ClassNotFoundException: scala.tools.nsc.util.ClassPath$JavaContext
      at java.net.URLClassLoader$1.run(URLClassLoader.java:366) ~[na:1.7.0_01]
      at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[na:1.7.0_01]
      at java.security.AccessController.doPrivileged(Native Method) ~[na:1.7.0_01]
      at java.net.URLClassLoader.findClass(URLClassLoader.java:354) ~[na:1.7.0_01]
      at java.lang.ClassLoader.loadClass(ClassLoader.java:423) ~[na:1.7.0_01]
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) ~[na:1.7.0_01]
  </code></pre>
  
  <p>Any idea?</p>