Fix incorrect time calculation

The initial time is always zero, not the restart time.
Simple mistake.

See merge request !6

The initial time is always zero, not the restart time.
Simple mistake.

Add functionality for a curvilinear coordinate

Compared to rectilinear coordinates, this will add an additional
field which corresponds to the correct vertical coordinate.
Visualization in ParaView or VisIt will require adjusting the
data field by this new field.

This closes issue #8 

See merge request !5

Visualization software (VisIt and ParaView) naturally reads the
netcdf file in the order swapped from what SPINS outputs. Having
the converter to the swapping makes the visualization considerably
easier. Swapping the axes as the default is desired and now
implimented

Compared to rectilinear coordinates, this will add an additional
field which corresponds to the correct vertical coordinate.
Visualization in ParaView or VisIt will require adjusting the
data field by this new field.

Ignore unnecessary options in spins.conf

Fixes issue #11

See merge request !4