Checkbox to Disable Append Action in Summarize Tool

[chris_cleckner]

Would be nice to have the option of disabling the append of the "action" to the variable in the summarize tool.  Sometimes it's useful to leave the variable name as is when making tweeks to your module. 

[lanny_newville]

It would also be nice to have an option to append the results of the summarize tool back to the original data stream without having to employ a join tool.

[GGard]

When we want to sum a large number of different columns, a tick-box to avoid the auto-rename would be a very nice-to-have feature!