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
Fixed#44 : BnfNodeParser: I must simplify results when multiple levels of ISA
Fixed#45 : Dynamic variables cannot be parsed at restart
Fixed#46 : Concepts variables values are transformed into list by default
Fixed#47 : SheerkaAdmin. Add min, max, mean time when restoring files
kodjo