Test: making sure that "readyComponentToString" doesn't call async state
Adding "when" package as devDependency so we can test async states from promises
Browser mixin: returning async state in a promise
prefetchAsyncState: returning async state in a promise
Server mixin: returning async state in a promise
Ops, using the same delay time across tests
Merge pull request #26 from eliseumds/master

Optional promise in getInitialStateAsync