Flip xy coordinates in ENVI files

[zsteinmetz]

Fixes #150

[zsteinmetz]

@wincowgerDEV, could you maybe have a second look if the coordinates are correct now? No worries, builds are failing only because I haven't updated the tests yet ..

[wincowgerDEV]

Code updates look good to me with a quick look but the heatmap output for sig_noise of the tiny map should reveal a blob in the center.

test <- read_any(read_extdata("CA_tiny_map.zip"))

heatmap_spec(test, z = sig_noise(test, metric = "sig_times_noise"))

This is what it looks like right now:

This is what it used to look like:

The two should really just be mirror images of one another but it looks like the alignment is off somehow.

[wincowgerDEV]

Not quite sure how to write a test for this but I think I got it figured out, the dcast needed to be updated too. Committing soon.

[wincowgerDEV]

I think we got it now.

[zsteinmetz]

Thanks, Win!