[yt-dev] Issue #649: PlotWindow should have toggles for the annotated axes and colorbar (yt_analysis/yt)

[Nathan Goldbaum]

New issue 649: PlotWindow should have toggles for the annotated axes and colorbar
https://bitbucket.org/yt_analysis/yt/issue/649/plotwindow-should-have-toggles-for-the

Nathan Goldbaum:

Something like this:

```
p = ProjectionPlot(pf, 2, 'Density')
p.toggle_axes()
p.save()
```

for a PlotCollection-like experience.  Or,

```
p = ProjectionPlot(pf, 2, ['Density', 'Temperature'])
p.toggle_colorbar()
p.save()
```

to remove the colorbar but leave the annotated axes.

Responsible: ngoldbaum