rethink method parameters: options to new(), data to ranges()

rethink method parameters: options to new(), data to ranges()

With normal usage, calling multiple ranges for the same data seems unlikely.
More useful would be to reuse the same options for different lists, so make
that the object variable.

Tests are a clear exception because the same input is reused often.
Doesn't suffer too much though, as options can now be kept instead.