change default pv colormap to grayscale

[keflavich]

for purpose of better talk figure

[coveralls]

Coverage increased (+0.1%) to 81.767% when pulling 03aa87a on keflavich:default_cmap_gui into 194f049 on radio-astro-tools:master.

[astrofrog]

Aw, why not Viridis? (jk)

[keflavich]

b/c c&p plt.cm.gray was easier. viridis is fine - want it instead?
dropdown would be sweet but that's too hard

On Wed, Mar 23, 2016 at 11:23 AM, Thomas Robitaille <
notifications@github.com> wrote:

Aw, why not Viridis?

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#74 (comment)

Adam

[astrofrog]

No, Viridis would require Matplotlib >1.5, gray is fine :)

[astrofrog]

Closing in favor of #95