add tool to count clusters (cd-hit)

clust_cnt.awk

+function printstats() {
+	if (numentries) {
+		print "Cluster " cluster ":\t" numentries " entries"
+		totentries += numentries;
+	}
+}
+
+/^>Cluster/ { 
+	printstats();
+	cluster = $2; numclust++; numentries = 0; 
+	next; 
+}
+{ numentries++ }
+END { 
+	printstats(); 
+	print "num clusters\t" numclust 
+    print "total\t" totentries " entries"; 
+}
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