chore(ngdocs): update lunr to 0.4.0
fix(jqLite): allow override of jqLite.triggerHandler event object
chore(ngdocs): allow user to press escape key to close docs search
fix(ngMock): ensure mocked window still provides window.location functionality
feat(ngdocs): support popover, foldouts and foldover annotations
feat(ngdocs): provide support for user to jump between different versions of the angularjs documentation
chore(ngdocs): provide test code for lunr search in docs