Visualization: Feather seems not to play nicely under Windows

[maverickactuary]

See conda-forge/feather-format-feedstock#1 for a hint on this. Installation is at best problematic - and I found it impossible.

I worked as follows:
Comment out all the following
import feather

%load_ext rpy2.ipython

%%R
suppressPackageStartupMessages(library(ggplot2))
library(feather)
write_feather(diamonds, 'diamonds.fthr')

And then replace
import feather
df = feather.read_dataframe('diamonds.fthr')
df.head()

with:
from ggplot import diamonds
// type(diamonds) # dataframe...
df = diamonds # primitive!
df.head()

There is one much more mundane issue, which I'll raise separately