Reset events include previous models.
Fix #1377 - Saving without attrs triggers "error".
allow for chaining of router navigation
Fragments should be handled encoded.
Backbone.sync now takes an emulateHTTP setting to override global setting
Use global emulate options as defaults.

* `sync` accepts `emulateHTTP` and `emulateJSON` as options.
* Use global options as defaults.
Merge pull request #1612 from joshvermaire/chain_navigation

allow for chaining of router navigation
fixing z-index
Merge branch 'master' of github.com:documentcloud/backbone
Fixes #1589 -- make the Backbonejs.org docs go responsive.
consistently handle `undefined` being passed to the model constr (#1545)
Merge pull request #1691 from wookiehangover/issue_1545

consistently handle `undefined` being passed to the model constr (#1545)
Fix #1684 - Correct regression in refactoring extend.
Merge pull request #1692 from braddunbar/extend

Fix #1684 - Correct regression in refactoring extend.
refactor change/set, fixing #1478 and #1664
whitespace cleanup after rebase
Allow view.el to be provided as a function.
fixing unescaped regex
Merge branch 'master' of github.com:documentcloud/backbone
merge conflict resolved