Added bnf when adding a new concept + Started logging filtering

main.py

@@ -14,16 +14,19 @@ def usage():
 
 def main(argv):
     try:
-        opts, args = getopt.getopt(argv, "hd", ["help", "debug"])
+        opts, args = getopt.getopt(argv, "hdl:", ["help", "debug", "logger="])
         debug = False
+        loggers = set()
         for o, a in opts:
             if o in ('-h', "--help"):
                 usage()
                 return True
             if o in ('-d', "--debug"):
                 debug = True
+            if o in ('-l', '-logger'):
+                loggers.add(a)
 
-        sheerka = Sheerka(debug=debug)
+        sheerka = Sheerka(debug=debug, loggers=loggers)
         sheerka.initialize()
 
         _in = core.utils.sysarg_to_string(args)