initial attempt at moving `add` logic to `update`
fix two parse tests to actually have something to parse
remove options check guard
attempt to follow BB style a little closer
have reset specify merge: false to update
save a remove loop by setting remove to false in reset
update returns `this`, save an extra line by returning update directly
Cleanup `reset` by using `add` to extend merge and remove args
Move stuff around, handle null cleanly
Merge pull request #1 from caseywebdev/refactor

Move stuff around, handle null cleanly
Revising CONTRIBUTING
Merge branch 'master' of github.com:documentcloud/backbone
Merge branch 'master' of github.com:documentcloud/backbone
Merging in the update unification.