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

src/core/sheerka/services/SheerkaEvaluateConcept.py

@@ -1,7 +1,7 @@
 from dataclasses import dataclass
 
 from core.builtin_concepts import BuiltinConcepts
-from core.builtin_helpers import expect_one, only_successful, parse_unrecognized, evaluate, ensure_concept
+from core.builtin_helpers import expect_one, only_successful, evaluate, ensure_concept
 from core.concept import Concept, DoNotResolve, ConceptParts, InfiniteRecursionResolved, AllConceptParts, \
     concept_part_value
 from core.global_symbols import NotInit
@@ -282,11 +282,11 @@ class SheerkaEvaluateConcept(BaseService):
             :return:
             """
             while True:
-                return_value = parse_unrecognized(current_context,
-                                                  s,
-                                                  parsers="all",
-                                                  prop=p,
-                                                  filter_func=only_successful)
+                return_value = current_context.sheerka.parse_unrecognized(current_context,
+                                                                          s,
+                                                                          parsers="all",
+                                                                          prop=p,
+                                                                          filter_func=only_successful)
 
                 if not return_value.status:
                     if current_context.preprocess: