[BUGFIX beta] Give precedence to routes with more static segments. Fixes #3573
Merge pull request #3575 from xtian/static-segment-precedence

Give precedence to routes with more static segments. Fixes #3573
[BUGFIX beta] sync router.js

- Sync router.js
- Don't fire `error` actions on transitions that have already been
  aborted/redirected
- Closes #3162
Merge pull request #3658 from machty/routerjs-sync

[BUGFIX beta] sync router.js
[DOC beta] Reference the guide on Feature Flags.

[ci skip]
Merge pull request #3660 from rjackson/update_features_documentation

[DOC beta] Reference the guide on Feature Flags.