Add jQuery bower dependency

Min version taken from nuget nuspec
Add QUnit testing during Grunt build

- Updated QUnit to 1.12
- Use root copies of toaster for the tests page
- Remove toastr copies under test
- Use the bower version of jQuery
Remove Close assertions

The toast-close button is not used in the main toast js so these test
constantly fail
Merge pull request #110 from nschonni/add-grunt-contrib-qunit

Add grunt contrib qunit