improved pvalue script

outputs/pvalues/pvalues.sh

 #!/bin/bash
-RUNS=50000
+RUNS=10000
 GRPS=('eager'
       'tagger'
       'tagparser')
 
 computePVal () {
-  rm -r results
+  rm -rf results
   NAME="$1"
   OUTPUT="$1.res"
   METRICS="UAS UPOS"