NgShow should be adding or removing the ng-hide class, not ng-show

[bgourlie]

Per http://docs.angularjs.org/api/ng.directive:ngShow

As it stands now, NgShow is adding and removing an ng-show class which makes it ineffective. It should be adding and removing the ng-hide class.

[bgourlie]

I should be able to submit a PR for this tomorrow.

[mhevery]

Fixed in 81fce7c