consider updating suggested directory structure

[hancush]

i'm not sure if it's just me, but it seems like we typically use a file structure more like this than the one we suggest in this repo. is this true? and if so, we oughta update this!

[fgregg]

Both those links go to the same place

[hancush]

you passed the test!

just joking – i meant to say it seems we use a file structure more like this one, but i'm not sure if it's actually we, or just me...