- updates underscore to 1.5.2 and backbone to 1.1.0
backbone had some breaking changes:
- fix url/urlRoot handling in models & collections
- options are no longer attached to the view by default
- collections reset when 'fetch' is called, tell it to keep the existing
models
other changes:
- fix some events triggering multiple times in connection with deleting
a model
- use document fragments instead of an element array for stream entries
- adapt jasmine and cucumber specs to the changed code
* no longer test the backbone router as part of our code
* jasmine factory already returns model instances, no need to wrap
that again
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