Give a way to force showing the survey

[jsedlacek]

Let's give users a way to force showing the survey for testing purposes.

From our customer:

Give a way to test the display of the popup. We aren't able to trigger it correctly by adjusting the createdAt date for testing.

[jsedlacek]

Can we use something like this? Or do you recommend other approach?

[[SatisMeter sharedInstance] identifyUserWithUserId: @"007"
                             writeKey: @"K7eMIPEXyPMlG7fu"
                             andTraitsDictionary: traitsDictionary]
                             forceSurvey: YES;