All routes can now optionally be queried.

The raw query string will be passed as last argument.
Query string now parsed if Backbone.qs defined
Removed fragment stripper. Changes to query params will trigger route change.
Fragment now includes query string and hash for pushState.

Hash is only included when wantsHashChange.
Added query string parsing support for pushState with hashChange

Also includes rename of Backbone.qs to
Backbone.History.parseQueryString.
Search params.
Add Router#execute hook.
Move delete back to model.remove

Reverts part of #2838 to prevent unexpected
behavior in collection/model remove events.
Merge pull request #2930 from tgriesser/remove-reference-patch

Move delete back to model.remove
gitignore bower_components
Merge pull request #2934 from watilde/develop

gitignore bower_components
Minor code tweaks to pass linting
Merge pull request #2942 from tgriesser/master

Minor code tweaks to pass linting
Merge pull request #2890 from braddunbar/search-params

Search params