Consider adding event filtering facilities

[jdunck]

Either a block to filter the events, or a DSL to restrict controllers/actions that report.

But probably wait until we hear a need from early customers.

[andrewberls]

Definitely agree that we should wait on customer input. I'm imagining an action-level API like

class SuperSensitiveController < ApplicationController
  framed_disable
  ...
end

class NormalController < ApplicationController
  framed_disable :sensitive_action_one, :sensitive_action_two # ...
  ...
end

Individual property filtering is a bit tougher to handle in a clean way, but I'm hoping that's a non-issue for some time to come