Fixing Import/Export logic

Number of Typos.  Also having issues with time varying constraints in
add_variable method, once that is rectified some or all of these changes
are mute, as well as, some prior commits in get_data.  Issue is with
numpy float 64 and int 64.  Add_variable logic might need further review
as well.
Misc tweeks to Hydro
Changes to output import/export power

Need to generalize the report outputs across the problem types.  If a
problem has network data it should automatically report network results.
Economic results should be reported when an economic dispatch has
occurred (most cases) .

Going to consider if report data should be sent to excel or database
should be an option.