oops, don't use shift on a reference

it's a pointer to the original data
adding instrumental for dom
tests for instrumental
build a test page for prepositions
adding an is_place column to the nouns

because some prepositions will require a place-y thing, and some
will require a person-y thing
handling that is_place attribute
adding mieszkać to test prepositions
enough setup to get the page to load and show a q

a prototype, but back to looking at the unit test
pickRandomActivePreposition pickVerbForPreposition

and some hacks to skip stuff so the page will load, fix
those later