write a readme about iassetr

[PietrH]

@SanderDevisscher Would you be willing to tackle this?

[PietrH]

I think the basic example could be something like;

# You need an access token to talk to the iAsset API. You can reuse this token
# over multiple requests, but you need to request a new one at least once every
# 24 hours.
my_token <- get_access_token("my_username")
# By default the package will only look on the `riparias` domain, and only for
# the `Vespa-Watch` custom inspection. If you don't provide an access token, the
# package will try to create one.
get_records(inspection_name = "Vespa-Watch", access_token = my_token)

It would be great if we could include a few rows of output as well, but we'd need to be really careful on what data we put in there.