et.data.get_data with url and path doesn't return expected behavior

[lwasser]

Describe the bug
Currently i would expect get_data to download the data folder in the given path.
However, instead it placed the data in the given path in an earthpy-downloads dir and then returns an incorrect path. It's probably ideal to set the path for download directly in the call after url rather than force the user to set the path manually via et.data.path. also the path returned is NOT the correct one so we should fix that

this issue was brought up in this lesson: 2018-02-05-spatial-data-landing-page in the ea-python course where we use the download package. because download isn't in conda-forge we'd rather use earthpy to keep the environment simpler.

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