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/lite.sb

@@ -0,0 +1,12 @@
+#import admin
+#import default
+
+def concept one as 1
+def concept two as 2
+def concept number
+def concept apple
+def concept table
+def concept location
+def concept x is on y as set_attr(x, location, y)
+
+