Refactored Layout and View, upgraded to latest LM

The Layout object was a simple wrapper over the Layout constructor
instead of extending the constructor itself.  I've patched this to make
it more consistent and removed duplicative methods.  I've also removed
the tests for `removeView` since that is now a built-in method.

The latest LM contains bugfixes and render performance updates that
unforuntately have to be opt-out.  Areas in the source or tests that are
expecting synchronous renders must be patched to work asynchronously to
take advantage.
We haven't used the commonjs pattern any where else in Fauxton so its better to stick to returning the Layout over using `module.exports`