write parsetab to parser directory

parser/__init__.py

@@ -6,6 +6,6 @@ import parserules
 
 def parse(input):
     lexer = lex.lex(module = lexrules)
-    parser = yacc.yacc(module = parserules)
+    parser = yacc.yacc(module = parserules, outputdir = 'parser')
     result = parser.parse(input)
     return result