Add incorrect implementation for OT of AddMember ops
Enable StepsCache verification
Expose SessionController configuration arguments for re-use
Meet Bella. She will destroy your documents.

* Supports multiple instances in the same doc
* Able to exercise entire selection controller
* Can say meow (and other text manipulation actions)
* Knows  about undo & redo
* Will also destroy your document formatting too!
* Can cut, copy & paste
* Bella is a tidy cat and likes valid documents
* Bella can be hooked up to use an existing cursor
* Custom actions to be loaded externally
* Has AMD integration
* Add checks to ensure the cursor is in a valid step.
Issue highlighted in review of PR #451.
* Add a seeded random number generator to allow reproduction of crashes.
Original source: https://github.com/davidbau/seedrandom
* Add some really simple reporting stats
* Allow seed to be specified via URL

Major features
==============
Add an "auto drive" feature (the cat herder)

Auto drive will automatically cycle the page after the specified
number of pounces. If an unhandled exception occurs, it will PUT a
file to the server in the same location that contains the number of
pounces that happened, and the original seed, along with the error
information.

Notes
=====
* Limit how frequently document length checks are performed
* Using a real SessionController causes problems with double-events