Added utr features

public/biopet-framework/src/main/scala/nl/lumc/sasc/biopet/utils/intervals/BedRecord.scala

@@ -47,6 +47,18 @@ case class BedRecord(chr: String,
     }))
   } else None
 
+  lazy val utr5 = (strand, thickStart, thickEnd) match {
+    case (Some("+"), Some(tStart), Some(tEnd)) => Some(BedRecord(chr, start, tStart - 1, name.map(_ + "_utr5")))
+    case (Some("-"), Some(tStart), Some(tEnd)) => Some(BedRecord(chr, tEnd + 1, end, name.map(_ + "_utr5")))
+    case _ => None
+  }
+
+  lazy val utr3 = (strand, thickStart, thickEnd) match {
+    case (Some("-"), Some(tStart), Some(tEnd)) => Some(BedRecord(chr, start, tStart - 1, name.map(_ + "_utr3")))
+    case (Some("+"), Some(tStart), Some(tEnd)) => Some(BedRecord(chr, tEnd + 1, end, name.map(_ + "_utr3")))
+    case _ => None
+  }
+
   override def toString = {
     def arrayToOption[T](array: Array[T]): Option[Array[T]] = {
       if (array.isEmpty) None