Kempe gap calc

[MDKempe]

These changes are inconsequential so anyone can approve. Fixed a function call to use "poa_global" and some integer/float variable type designation, and an issue with using temperature.temperature instead of temperature.cell.

[tobin-ford]

This adds all of my scenario changes to development which we aren't ready for yet because we merged dev_geospatial_scenario -> Kempe_Gap_Calc earlier instead of updating the tutorial on dev_geospatial_scenario.

Probably best to hold off on this or change scope.

[martin-springer]

Yeah, we want to wait with those until the scenario analysis is ready. @MDKempe - if your changes are not associated with the scenario analysis, pull them into another branch that doesn't have those changes in it and we can move them forward.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 44.69697% with 584 lines in your changes missing coverage. Please review.

Project coverage is 62.47%. Comparing base (57cb222) to head (679e347).

Files	Patch %	Lines
pvdeg/scenario.py	31.38%	341 Missing :warning:
pvdeg/geospatial.py	11.71%	113 Missing :warning:
pvdeg/utilities.py	28.76%	104 Missing :warning:
pvdeg/weather.py	22.22%	21 Missing :warning:
pvdeg/standards.py	71.42%	2 Missing :warning:
pvdeg/temperature.py	96.77%	2 Missing :warning:
pvdeg/degradation.py	94.44%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## development #95 +/- ## =============================================== - Coverage 67.02% 62.47% -4.56% =============================================== Files 29 30 +1 Lines 2111 3046 +935 =============================================== + Hits 1415 1903 +488 - Misses 696 1143 +447 ```

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[tobin-ford]

Added the plotting for the region standoff calculation in the IEC 63126 tool that Mike and I talked about last week.