Reset events include previous models.
Fix #1377 - Saving without attrs triggers "error".
allowing propname arg as collection comparator
variable name cleanup
changed suffix syntax to prefix
Update examples/todos/todos.js

fix js bug: Uncaught TypeError: Cannot read property 'localStorage' of undefined 
updated docs to reflect new comparator API
refactored to replace comparator string with the generated function instead of generating on every sort call
allow for chaining of router navigation
minor performance refactor
automatic resort when sorting attribute changes
updated docs to reflect automatic resorting
test update
removed automatic sorting in anticipation of sort option to .set
removed prefix logic
Tweak string comparator implementation.
Refactor reset/sort.

* Avoid creating unnecessary objects/arrays.
* Add test for sort-style comparator context.
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.