Create downloadable CSV of the raw dive behavior data

[jmlondon]

@cekuhn suggested it would be nice to have a way to download and explore the dive behavior in more details. This is especially important b/c the 'raw' data from the WC portal is pretty difficult to interpret.

The idea, here, would be to create a CSV with deployid, date/time/hour, and a column for each depth bin. The values would be proportion of time submerged as is shown in the plots.

Creating the CSV should be pretty easy. Creating the download option might take some Googling and hacking.