Added asFile

public/biopet-framework/src/main/scala/nl/lumc/sasc/biopet/core/config/ConfigValue.scala

@@ -25,6 +25,12 @@ class ConfigValue(val requestIndex: ConfigValueIndex, val foundIndex: ConfigValu
    */
   def asString = any2string(value)
 
+  /**
+   * Get value as File
+   * @return value as File
+   */
+  def asFile = new File(any2string(value))
+
   /**
    * Get value as Int
    * @return value as Int