[ENH]Logo

[arokem]

The current graphic/logo makes sense before #57 was merged, but is now a bit weird. We should replace it with another logo/graphic that conveys tractability or tabularness or brain tracts, or some combination of these things 😄

[richford]

For inspiration, I like how the pandas logo and the tibble logo allude to tabular data. Maybe we could do something similar but make it somehow more "brainy" or "white matter bundly." Maybe criss-crossing bundles on the left that turn into more ordered tabular data on the right.