v0.5.0

Added

• add from_elements constructor for RangeList
• [breaking] split DiscreteElement into Adjacent and Step
• allow diff operations for floating point RangeList.
• add min, max, tighten_min, and tighten_max methods, deprecating lower_bound, upper_bound, set_lower_bound, and set_upper_bound in favour of these new methods.

Other

• update crate to be in its own repository