Change default option on "essential" so that an options summary is printed.

[donnaaboise]

Originally reported by: Donna Calhoun (Bitbucket: donnaaboise, GitHub: donnaaboise)

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I'd like to have the default option for the "essential" reporting print an options summary after all options are read in. While the "options.used" file is good for the latest run, often I like scroll back through the terminal output to look at previous output timing results, but I may have forgotten what exactly the settings were for the run. If' the summary was printed out, I'd know exactly what options produced the results.

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• Bitbucket: https://bitbucket.org/donnaaboise/forestclaw/issue/92

[donnaaboise]

Original comment by Donna Calhoun (Bitbucket: donnaaboise, GitHub: donnaaboise):

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Done, although I might want to revisit what "essential, production, info, and debug" should mean. I may have a rather generous interpretation of what is "essential".