Range relations support

[thurstonsand]

see here: https://docs.datastax.com/en/cql/3.3/cql/cql_reference/select_r.html?scroll=reference_ds_d35_v2q_xj__filtering-a-full-frozen-collection (scroll down a bit -- the header wasn't linkable for some reason)

ideas:

1. probably same ideas as 1) in #3 but for ranges:

PredefinedLessThan[T: Numeric](num: T)
case class MyQuery(i: PredefinedLessThan[Int])
ss.select("mytable", MyQuery(PredefinedLessThan(100)))