joinlist

A JoinList - a list type with with cheap catenation. Generally speaking, joinlists have cheap construction (cons, snoc and join aka. append) and expensive manipulation. For most use-cases Data.Sequence is a more appropriate data structure. Changelog 0.3.0 - Added views as per Data.Sequence and takes and drops. Changed show instance to mimic Data.Sequence. 0.2.0 - more operations and some bugfixes (toList...), wrap renamed to singleton.