Added module-level import of uhf
Updated question list
Removed forces/velocities until needed
Simplified nocc and added nclosed, nopen, nup, ndown, etc.
Added ability to make j and k operators separately
Removed the mock stuff, since it didn't generalize
Added uhf Hamiltonians
Added a simple uhf iterator
Simplified tests and added uhf tests
Corrected density matrices for uhf systems
Tweaks to get UHF to work
Updated notes with "What works so far" section
Formatting