Master

added 4 commits

• b02e7a74 - fix bug in mapping nested options in set_command_option
• 1294320e - fix bug in estimation input: mh_recover
• 0e7e37fc - add posterior_sampling_method to estimation options, closes #10 (closed)
• 3753d5f9 - fix bug in estimation input: optim

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mentioned in commit 9465075d

merged