adding a removeLine method to kat, to allow me to remove wrong

code lines that were not parsed into an object but have been
added as extra lines. This works for me, but we could do
something more sophisticated if needed.

pykat/finesse.py

@@ -606,6 +606,15 @@ class kat(object):
             
             return [x, y, hdr]
 
+    def removeLine(self, fragment) :
+        for key in self.__blocks:
+            objs = self.__blocks[key].contents
+            for obj in objs:
+                if isinstance(obj, str):
+                    if fragment in obj:
+                        print "  ** removing line '{0}'".format(obj)
+                        objs.remove(obj)
+                
     def generateKatScript(self) :
         """ Generates the kat file which can then be run """