Added basic Jupyter Note support

src/core/sheerka/Sheerka.py

@@ -115,6 +115,7 @@ class Sheerka(Concept):
 
         self.last_executions = []
         self.last_return_values = []
+        self.execution_count = 0
 
     @property
     def resolved_concepts_by_first_keyword(self):
@@ -436,6 +437,7 @@ class Sheerka(Concept):
         #         with open(CONCEPTS_FILE, "a") as f:
         #             f.write(text + "\n")
 
+        self.execution_count += 1
         self._last_execution = execution_context
         if len(self.last_executions) == self.MAX_EXECUTION_HISTORY:
             del self.last_executions[0]