Wrap dashboard dispatcher parameters into class
Pass JobStorage instance to RequestDispatcherContext
Make DashboardMiddleware class internal

It was public by mistake
Remove reference to JobStorage.Current in dashboard pages

References replaced with instances from RequestDispatcherContext.
Fix recurring & layout pages
Add /hangfire-redis handler to MvcSample
Merge pull request #175 from HangfireIO/dashboard-storage

Explicit `JobStorage` instance for Dashboard