Fixed #125: SheerkaErrorManager

Fixed #135: Change services service priorities
Fixed #136: ErrorManager: Implement recognize_error
Fixed #137: BNFNodeParser : Error when parsing regex with sub parsers
Fixed #138: get_last_errors(): real errors sources are lost
Fixed #139: OneError return value removes the origin of the error
Fixed #140: Concept variables are not correctly handled when parsing sub expression
Fixed #143: Implement has_unknown_concepts()

tests/sheerkapython/test_PythonExprVisitor.py

@@ -17,7 +17,7 @@ class TestPythonExprVisitor(TestUsingMemoryBasedSheerka):
 
     @staticmethod
     def get_expr_node(context, expression, parser=None):
-        parser = parser or ExpressionParser(old_style=False)
+        parser = parser or ExpressionParser()
         error_sink = ErrorSink()
         parser_input = ParserInput(expression)
         parser.reset_parser_input(parser_input, error_sink)