Remove silent option from Model#set.
Fixed to pass with edge version of Underscore

Due to changes in https://github.com/documentcloud/underscore/commit/0ab5bdccd41e55fb02331ec7d2d0053e0bdac9e3 need to fix Backbone.Model test. It would be helpful because some people may use Backbone's unit tests in their Backbone-related projects (plugins for example).
Update due to recomendations
Fixed typo
Tweak language.
Fix #2296 `get` works with `0` as a model id
Simplify test
Tweak .parse(opt) to be .parse(attrs) for descriptiveness.
Merge pull request #2304 from dillonforrest/fix/descriptive-parse-tests

In tests, I tweaked model.parse(opt) to be model.parse(attrs) for descriptiveness
Merge pull request #2282 from DreamTheater/patch-1

Fixed to pass with edge version of Underscore
Fix #2312 - Clarify eventsApi logic.
improve rendering of travis-ci build status

* destretch by removing dimensions, also future proofs size changes
* forcibly move to next line
* uses css attr selector, other strategies may be better
adding a class to the travis badge
Document master as the target branch for pull requests.
Reword based on discussion.
Merge pull request #2319 from braddunbar/target-branch

Document master as the target branch for pull requests.
Merge pull request #2113 from braddunbar/silent

Remove silent option from Model#set.
Correct minor spelling mistake.
Merge pull request #6 from documentcloud/master

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