Occam2d fixes

[alkirkby]

Various updates to Occam2d so that it works and gives correct results. Seems to be failing tests when building environment for testing. Not sure why.

[alkirkby]

OK- got the env to load ok. Will look into failing tests.

[kujaku11]

@alkirkby looks like we just need to change the number of significant digits in the test, maybe something like 5 sig figs.

Looks like the they are the tests test_mt_stations.

[codecov]

Codecov Report

Attention: Patch coverage is 24.44444% with 34 lines in your changes missing coverage. Please review.

Project coverage is 33.23%. Comparing base (d503d0a) to head (60d3368).
Report is 90 commits behind head on updates.

Files with missing lines	Patch %	Lines
mtpy/modeling/occam2d/regularization.py	6.25%	15 Missing ⚠️
mtpy/modeling/occam2d/mesh.py	0.00%	7 Missing ⚠️
mtpy/modeling/occam2d/model.py	33.33%	4 Missing ⚠️
mtpy/core/mt_data.py	0.00%	2 Missing ⚠️
mtpy/core/mt_stations.py	77.77%	2 Missing ⚠️
mtpy/modeling/occam2d/data.py	0.00%	2 Missing ⚠️
mtpy/modeling/occam2d/startup.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           updates      #56      +/-   ##
===========================================
+ Coverage    33.20%   33.23%   +0.03%     
===========================================
  Files          146      146              
  Lines        23966    24002      +36     
===========================================
+ Hits          7957     7978      +21     
- Misses       16009    16024      +15     

Flag	Coverage Δ
tests	33.23% <24.44%> (+0.03%)	⬆️

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[kujaku11]

@alkirkby, I updated the tests so they pass.

[alkirkby]

Awesome thank you @kujaku11 and sorry I didn't get to this. I did change some things in generate_profile so that the 0 point in the profile is a perpendicular projection of the first site, I hope that didn't break anything else.