added eval_mcf.pl

tools/eval_mcf.pl

 #!/usr/bin/perl
 
 $arg = shift;
+
+
 while($arg){
     if($arg eq "-g"){$ref = shift;}
     elsif($arg eq "-s"){$hyp = shift;}
@@ -36,7 +38,7 @@ $arg = shift;
 }
 
 # determine the column in the reference file
-
+# 
 $ref_form_col = 0;
 $ref_pos_col = 1;
 $ref_lemma_col = 2;