export all plate maps from a single study to a tsv/excel file

[josenavas]

Requested by Lindsay:

On the study page, it would be useful to be able to download all the plate maps of a single study in a excel-compatible file.

[AmandaBirmingham]

I am deeply confused as there IS no study page in LabControl ... is this referencing Qiita?

[charles-cowart]

See #196 (comment) for a solution to an earlier version of the codebase.