Support Filters for RazorPages

[sebastienros]

Right now filters are not executed for Razor Pages.

I use filters to inject HTML content in the views based on external rules.
Examples:

• Widgets based on the current context (User, url, time of day) independently from the view
• Inject static resources like Scripts, Styles in the Layout based on the components that are executed during the page rendering

[pranavkm]

Presumably this is means action and result filters. We support, Resource, Auth and exception filters in RazorPages as of now.

[rynowak]

In this case we're talking about result filters. We'll likely have a story similar to action filters, but different. Result filters will probably 'just work'.

[rynowak]

688e518

Result filters added