adding unofficial coloring rules

reporting/src2ans

@@ -87,6 +87,8 @@ Special syntaxes:
     parser.add_argument("-v","--version",action="version",version=__version__)
     parser.add_argument("--no-color","-n",action="store_false",dest="color",default=True,
                      help="Disable color.")
+    parser.add_argument("-z",action="store_true",dest="zero",default=False,
+                     help="Reset coloring at the end of each line.")
     parser.add_argument("filename",type=str, 
                      help="File to show")
     opts=parser.parse_args()
@@ -104,6 +106,8 @@ for row in f:
     else:
         colored=bc.nocolor_string(row)
     sys.stdout.write(colored.encode('utf-8'))
+    if opts.zero:
+        sys.stdout.write(bc.Z)
     sys.stdout.write("\n")