adding reconstruction codes for code review

[saminur]

No description provided.

[bradley-erickson]

@saminur much of this code looks okay as a proof of concept
More information about how the tabs work / what commands are associated with tabs should be documented further. The information about how they work is crucial for determining the best way these will operate within the system.
Any of the these new or modified commands should be added to the modules/writing_observer/writing_observer/reconstruct_doc.py under the dispatch variable where all other Google doc commands are handled.