Integrate "geospatial.py" module with new "validate_spatial" class

[sjh1024]

No description provided.

[sjh1024]

From @JessicaS11's comment on #318 -

It is worth thinking about how the spatial portion might be (potentially) combined with the geospatial.py module as well as utilizing existing libraries to the extent possible to validate and refine inputs. For instance, using Shapely:

import shapely.geometry as geom
bbox = [-55, 68, -48, 71]
b_bbox = [-55, 71, -48, 68]

fmtbox = geom.box(*bbox)
b_fmtbox = geom.box(*b_bbox)

Both fmtbox and b_fmtbox will output (-55.0, 68.0, -48.0, 71.0) as the valid, correctly formatted bounding box. In this case, we could eliminate completely the check + user warning that they entered the coordinates in the wrong order. However, this DOES NOT deal with #151 (which I think is due to #117) and would actually make cross-dateline queries more challenging, so we should keep that in mind before implementing this route (perhaps requiring the user to manually specify via keyword they intend to cross the dateline with their query and then handling the request accordingly?).

[sjh1024]

Decided to make this a separate issue so I can look into it after the "first" version of the spatial class is merged into development (basically the same as the original spatial function in validate_inputs with a few structural changes)

[sjh1024]

Issue has been resolved with PR #322