Fixed #55 : DefConceptParser: failed to recognize concept

Fixed #62 : DefConceptParser: parsing error
Fixed #64 : DefConceptParser: Failed to parse when too many concept keyword
Fixed #65 : DefConceptParser : Add auto_eval keyword
Fixed #66 : DefConceptParser : Add def_var keyword
Fixed #67 : Add get_errors()

tests/BaseTest.py

@@ -45,7 +45,7 @@ class InitTestHelper:
                         c.get_metadata().definition_type = DEFINITION_TYPE_BNF
                     else:
                         raise Exception(f"Error in bnf definition '{c.get_metadata().definition}'",
-                                        self.sheerka.get_error(res))
+                                        self.sheerka.get_errors(res))
 
             if create_new:
                 self.sheerka.create_new_concept(self.context, c)
@@ -89,7 +89,7 @@ class InitTestHelper:
                 res = self.sheerka.create_new_rule(self.context, rule)
                 if not res.status:
                     raise Exception(f"Error in rule definition '{res.body}'",
-                                    self.sheerka.get_error(res))
+                                    self.sheerka.get_errors(res))
                 self.items.append(res.body.body)
             else:
                 self.items.append(rule)