Controller grabs direct reference to view's model if possible.
Moving the Todos Views to using Controllers.

Also, updated backbone and backbone-relational.
Moving Todolist view to using its controller.
Moved to using backbone-relational master to solve backbone-relation#270
Tests don't fail.
Todolist view uses controller to create models

This should also fix #5
On Todo completion the Todo view is removed via controller.
Updated to latest backbone-relational and underscore.

Delete old version of backbone, underscore, and backbone-relational.
Simplified some todolist/donetodolist tests.
Moved registering the todoview creation listener into the controller.