NAR-150 #comment added in working helper methods for scripts returned in "valid_commands" function of invocation service. These work with the normal ipython autocompletion features, so typing "invoker." and hitting tab will offer completions. Need to cleanup the remaining invoke_* magics.
NAR-150 #comment added in working helper methods for scripts returned in "valid_commands" function of invocation service. These work with the normal ipython autocompletion features, so typing "invoker." and hitting tab will offer completions. Need to cleanup the remaining invoke_* magics.

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