chore(travis): Fix travis releases and e2e tests

Travis doesn't have an "after all matrixes build successfully" option, so
we'll just run serially for now.

- Also fix the ui-grid js file pointing to localhost:9999 absolutely
rather than relatively.
- And up the timeout for Sauce Labs e2e tests to 60 seconds
Merge branch '3.0' of https://github.com/angular-ui/ng-grid into 3.0