fix(docs): handle the empty string in errorDisplay
fix(ngMock): keep withCredentials on passThrough

When using passThrough() and specifying withCredentials on the $http
call, the option is now passed to the underlying $httpBackend.
docs(compile/iscp): description for compile/iscp error
chore(ngMock): rename $animate.process to $animate.flushNext()
chore(ngMock): remove unused $animate delegation methods
fix(ngShowHide): change the .ng-hide CSS class to use an !important flag
chore(ngdocs): make sure the fold feature doesn't show up during page load
fix(ngAnimate): remove compound JS selector animations
fix(animate): cleanup global leaked vars.