Add tags to downloads update task. Closes GH-691.
Merge pull request #693 from chaplinjs/topics/tagging-downloads

Add tags to downloads update task. Closes GH-691.
Just whitespace changes to give Github a pat
Update backbone to 1.1.
Remove appearances of _.isRegExp, _.pick and _.template.

First step of decreasing dependency on underscore.
Remove _.map appearances.
Remove _.filter, _.has and _.find usage.
Remove _.isEmpty usage and optimise collection view filterer.
Revert "Remove _.isEmpty usage and optimise collection view filterer."

This reverts commit cbac12ff8d67c93ea2ae0702b99d7c00e7acfcc6.
Remove _.isArray, _.indexOf, _.bind. Add some to utils.
Remove _.isEmpty.
Revert "Remove _.isEmpty."

This reverts commit 717314911ce6f33b114b00c68d5103289a5f5ccd.
Remove _.clone.
Finally drop _.isEmpty.
Make jQuery optional.
Nine failing tests.
Remove debug logging.
Fix promise tests: don't depend on $.Deferred.
Cross-platform matchesSelector, fix ALL tests.
Fix tests in Firefox.