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/core/test_SheerkaRuleManagerRulesCompilation.py

@@ -25,7 +25,7 @@ class BaseTestSheerkaRuleManagerRulesCompilation(TestUsingMemoryBasedSheerka):
 
     @staticmethod
     def get_conditions(context, expression):
-        parser = ExpressionParser(old_style=True)
+        parser = ExpressionParser()
         error_sink = ErrorSink()
         parser_input = ParserInput(expression)
         parser.reset_parser_input(parser_input, error_sink)
@@ -927,7 +927,7 @@ class TestSheerkaRuleManagerRulesCompilationRecognizeConcept(BaseTestSheerkaRule
             Concept("my best friend"),
             create_new=True
         ).unpack()
-        parser = ExpressionParser(old_style=True)
+        parser = ExpressionParser()
         expected = get_rete_conditions(*expected_as_list_of_str)
 
         error_sink = ErrorSink()