:thought_balloon: :bulb: I'm thinking of doing some method swizzling on the `defaultSessionConfiguration` and `ephemeralSessionConfiguration` methods directly in `[OHHTTPStubs setEnabled:]` method, so that `OHHTTPStubs` will be automatically and transparently enabled for all `NSURLSessionConfiguration` created…  (no additional code to add from the user :+1:)

`setEnabled:forSessionConfiguration:` would still be a good addition in cases users wanted to enable/disable stubs _per session_, but in the majority of cases letting `OHHTTPStubs` enable itself automatically and transparently seems to be a nice touch. What do you think?