reset dice models to use TDD
Added new exceptions

ImpossibleException now gives a message for users to email me
Added MissingRangeException
Started OverlappingRangesException
Merge branch 'ftr/diceModel' of github.com:sad2project/UDiceSystem into ftr/diceModel
Merge branch 'ftr/rollers' of github.com:sad2project/UDiceSystem into ftr/diceModel
Merge branch 'hotfix' into ftr/diceModel
Merge branch 'ftr/rollers' of github.com:sad2project/UDiceSystem into ftr/diceModel
Round 1 of TDD, working with Range

removed RangeTestRunner
modified URange to use URange.from(#).to(#)
as a consequence, RangeTest needed to be modified and
RangeBuilderTest needed to be created