Merge v0.15.0 pyaerocom into master

[lewisblake]

No description provided.

[codecov]

Codecov Report

Attention: 432 lines in your changes are missing coverage. Please review.

Comparison is base (1710480) 80.42% compared to head (46b2e67) 78.95%.

Files	Patch %	Lines
pyaerocom/io/read_airnow.py	31.66%	82 Missing ⚠️
pyaerocom/io/aux_components_fun.py	24.27%	78 Missing ⚠️
pyaerocom/plugins/icos/reader.py	38.00%	62 Missing ⚠️
pyaerocom/colocation_3d.py	69.61%	55 Missing ⚠️
pyaerocom/aeroval/coldatatojson_engine.py	56.32%	38 Missing ⚠️
pyaerocom/aux_var_helpers.py	23.68%	29 Missing ⚠️
pyaerocom/colocation_auto.py	53.44%	27 Missing ⚠️
pyaerocom/plugins/ipcforests/reader.py	85.56%	27 Missing ⚠️
pyaerocom/plugins/ipcforests/metadata.py	92.94%	12 Missing ⚠️
pyaerocom/griddeddata.py	42.85%	8 Missing ⚠️
... and 8 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #951      +/-   ##
==========================================
- Coverage   80.42%   78.95%   -1.48%     
==========================================
  Files         101      105       +4     
  Lines       17433    18423     +990     
==========================================
+ Hits        14021    14545     +524     
- Misses       3412     3878     +466     

Flag	Coverage Δ
unittests	78.95% <64.38%> (-1.48%)	⬇️

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[avaldebe]

merge when you have the time