add requirements to graphclust

Author: bgruening

graphclust/graphclust.xml

@@ -1,7 +1,16 @@
 <tool id="graphclust" name="GraphClust" version="0.1">
     <description>alignment-free structural clustering of local RNA secondary structures</description>
+    <requirements>
+        <requirement type="package">GraphClust</requirement>
+        <requirement type="package">locarna</requirement>
+        <requirement type="package">RNAShapes</requirement>
+        <requirement type="package">cmfinder</requirement>
+        <requirement type="package">infernal</requirement>
+        <requirement type="package">rnaz</requirement>
+        <requirement type="package">vienna_rna</requirement>
+    </requirements>
     <command>
-        perl MASTER_GraphClust.pl 
+        MASTER_GraphClust.pl 
             --fasta $input_fasta 
             --config $graphclust_config 
             --root $output.extra_files_path