trying with faster array reset code (see http://stackoverflow.com/q/1232040)
fix failing test cases
use slice instead of _.clone per @caseywebdev
add collection models init to constructor
Add link to Docs for old versions of Backbonejs
Add links to Diff and Docs for older Backbonejs versions as well
Issue number in comments.
remove dead link
Merge pull request #2114 from hswolff/stray-link

Removes dead link from docs
Merge pull request #2106 from akre54/array-reset-speed-testing

Faster Collection _reset
Use === instead of == in Model#save

Its just a nit pick. I stumbled upon it today.
Merge pull request #2121 from gsamokovarov/patch-6

Use === instead of == in Model#save
Clarify collection request/sync event behavior
Merge pull request #2127 from philfreo/master

Clarify collection request/sync event behavior
Fixed minor bug in examples/todos/todos.js

AppView.addOne was being called with incorrect context from addAll.
The method still worked, since window.$("#todo-list") returns the correct element, 
but it may be confusing for people learning backbone.js.
Merge pull request #2128 from colevscode/master

Fixed a minor bug in examples/todos/todos.js
fix for #2100
Merge pull request #2132 from tgriesser/listenTo-patch

Fix for #2100
Bail from listenTo early.
Merge pull request #2133 from braddunbar/listen-to

Bail from listenTo early.