feature/CON-265

[robertcli]

Review for Jeff

[robertcli]

Latest commit contains SpotlessApply.

[robertcli]

I reversed the order of the history and undo(changes, key, record) is now undoing results accurately. Also: added <= to while loop.

NORMAL: 1565204100041001 ADD hi AS 5 (INTEGER) IN 1 AT 1565204100041001
NORMAL: 1565204154077001 REMOVE hi AS 5 (INTEGER) IN 1 AT 1565204154077001
NORMAL: 1565204154078000 ADD hi AS bye (STRING) IN 1 AT 1565204154078000
NORMAL: 1565282665359000 ADD hi AS 5 (INTEGER) IN 1 AT 1565282665359000
NORMAL: 1565282665363000 REMOVE hi AS bye (STRING) IN 1 AT 1565282665363000

REVERSE: 1565282665363000 REMOVE hi AS bye (STRING) IN 1 AT 1565282665363000
REVERSE: 1565282665359000 ADD hi AS 5 (INTEGER) IN 1 AT 1565282665359000
REVERSE: 1565204154078000 ADD hi AS bye (STRING) IN 1 AT 1565204154078000
REVERSE: 1565204154077001 REMOVE hi AS 5 (INTEGER) IN 1 AT 1565204154077001
REVERSE: 1565204100041001 ADD hi AS 5 (INTEGER) IN 1 AT 1565204100041001

[jtnelson]

@robertcli you should write some unit tests