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/non_reg/test_sheerka_non_reg2.py

@@ -123,7 +123,7 @@ class TestSheerkaNonRegMemory2(TestUsingMemoryBasedSheerka):
 
         assert len(res) == 1
         assert not res[0].status
-        assert isinstance(res[0].body, ConceptEvalError)
+        assert isinstance(res[0].body.body, ConceptEvalError)
 
     def test_74_keyword_parameters_are_no_longer_recognized_when_a_concept_that_redefines_equality_is_created(self):
         init = [