Add initial station data handling tutorials

[tennlee]

Adds a sequence of five tutorials for downloading, processing and then utilising station data within the PyEarthTools framework

[coveralls]

Pull Request Test Coverage Report for Build 19088861991

Details

• 5 of 9 (55.56%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.01%) to 61.235%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/data/src/pyearthtools/data/download/weatherbench.py	5	9	55.56%

Totals
Change from base Build 18939707481:	-0.01%
Covered Lines:	9560
Relevant Lines:	15193

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💛 - Coveralls