Implemented some enhancement request and fixed some bugs

Fixed #2 : Variables are not recognized when inside a rule token
Fixed #15 : Rule: rete attributes are lost when a new ontology is created
Fixed #14 : ReteNetwork: Format rules must not be added to Rete network
Fixed #16 : DefConcept: Variables are not recognized when they are keyword arguments
Fixed #4 : Comparison are not correctly set when comparison property is a concept
Fixed #14 : Parser: merge FunctionParser.NamesNode and ExpressionParser.NamesNode
Fixed #18 : Parser: Add SourceCodeNode test to UnrecognizedNodeParser
Fixed #20 : At startup Number concept is saved in db a numerous number of time
Fixed #21 : CacheManager: I can remove all elements from a ListIfNeededCache and fill it again
Fixed #22 : CacheManager: I can remove all elements from a SetCache and fill it again
Fixed #23 : HistoryManager: history() no longer works
Fixed #24 : HistoryManager: history() no longer works after creating an exec rule
Fixed #25 : SheerkaMemory: Use MemoryObject instead of sheerka.local
Fixed #26 : Debugger: add the list all available services..
Fixed #27 : CONCEPTS_GRAMMARS_ENTRY does not seems to be in use any more
Fixed #28 : Give order to services

tests/core/test_SheerkaEvaluateConcept.py

@@ -1,15 +1,13 @@
-from dataclasses import dataclass
-
 import pytest
+
 from core.builtin_concepts import BuiltinConcepts, ReturnValueConcept, ParserResultConcept
 from core.concept import Concept, DoNotResolve, ConceptParts, InfiniteRecursionResolved, CB, \
     concept_part_value, DEFINITION_TYPE_DEF
-from core.global_symbols import NotInit
+from core.global_symbols import NotInit, NotFound
 from core.sheerka.services.SheerkaEvaluateConcept import SheerkaEvaluateConcept
 from core.sheerka.services.SheerkaMemory import SheerkaMemory
 from parsers.BaseParser import BaseParser
 from parsers.PythonParser import PythonNode, PythonParser
-
 from tests.TestUsingMemoryBasedSheerka import TestUsingMemoryBasedSheerka
 from tests.evaluators.EvaluatorTestsUtils import pr_ret_val, python_ret_val
 
@@ -778,12 +776,12 @@ class TestSheerkaEvaluateConcept(TestUsingMemoryBasedSheerka):
 
         evaluated = sheerka.evaluate_concept(context, command)
         assert evaluated.key == command.key
-        assert "a" not in sheerka.locals
+        assert sheerka.get_from_memory(context, "a") == NotFound
 
         sheerka.set_isa(context, command, sheerka.new(BuiltinConcepts.AUTO_EVAL))
         evaluated = sheerka.evaluate_concept(context, sheerka.new("command"))
         assert evaluated.key == command.key
-        assert "a" in sheerka.locals
+        assert sheerka.get_from_memory(context, "a").obj == 10
 
     @pytest.mark.parametrize("metadata", [
         ConceptParts.WHERE,