Fixed #61 : SheerkaDebugManager: Add get_value()

Fixed #60 : Hash error when ReturnValue is a list of list
Fixed #59 : Implement smart_get()
Fixed #58 : SheerkaPromptCompleter: Cannot parse concept token
Fixed #57 : SheerkaPrompt: Add concept autocompletion
Fixed #56 : automatically backup command
Fixed #54 : I can record execution status
Fixed #53 : ConceptManager: modify_concept fails

sheerka_backup/test-adjective.sb

@@ -0,0 +1,10 @@
+#import full
+push_ontology("test-adjective")
+def concept size
+def concept little
+def concept girl
+def concept little x as set_attr(x, size, little) ret x
+def concept the x ret memory(x)
+def concept how is x as get_attr(x, size)
+
+