Fix #1978 - Correctly document `model.urlRoot` and `collection.url`
Fix #1987 - Mention the removal of `options.index` in the changelog

Conflicts:
	index.html
Fix #2023 - Change log mentions ignored search parameters in routes.
Add keys, values, pairs, invert, pick, omit, each, and other
underscore methods to models
Merge branch 'gh-pages' of github.com:documentcloud/backbone into gh-pages
Merge branch 'master' into gh-pages
Merge branch 'master' into gh-pages
Merge branch 'master' into gh-pages
add reset collection memory tests
Documentation Fix: as -> are
Remove silent option from Model#set.
Merge branch 'master' into gh-pages
Improve consistency: get rid of a zealous early error breaking apps in inconvenient ways

Since jQuery.on() and Backbone.Events.on are silently ignoring invalid callbacks,
Backbone.View.delegateEvents should too.

See #2184 for previous discussion about how Backbone is supposed to behave on obvious developer errors
Merge branch 'master' into gh-pages
lowercase books in docs
making error/success handlers promise compatible
Add missing wrapError and simplify a bit.
Merge pull request #1 from braddunbar/sync

Add missing wrapError and simplify a bit.
One simplification step further...
Merge pull request #2 from caseywebdev/sync-revert2

One simplification step further...