async is neat but we don't want to wait for this thing so use the simpler
thing instead

fix -Werror, now it's a linker problem

See merge request !58

If you use a module that cabal doesn't know about, first it warns you and then
later it fails to link because it doesn't have the module.

Read grid configuration using the Obelisk "Config" system

Closes #59

See merge request !55

This makes it easy to have a data file alongside the source instead of
embedding the data in the source - which in turn makes it easier to fiddle (as
a developer) with the grid configuration.

Support nested folders in the file browser

See merge request !54

it seems unhappy with haddocks above the `=>` or `::`?

the feature branch has been merged, hooray