revised ballgown

tasks/ballgown.wdl

@@ -8,7 +8,7 @@ task ballgown {
     command <<<
       mkdir -p /cromwell_root/tmp/${base}
       cp -r ${sep=" " ballgown} /cromwell_root/tmp/${base}
-      Rscript /usr/bin/ballgown.R /cromwell_root/tmp/${base} ${base}.txt
+      ballgown /cromwell_root/tmp/${base} ${base}.txt
     >>>
     
     runtime {