mikoskinen/Caliburn-Micro-WinRT-Callisto-Helpers — pull request #3 by ibebbs (2013-01-20 10:17:43+00:00)
Title: Changed Screen to IScreen

The DialogService would only allow Screen types to be specified as the
generic type but this doesn't play nice with some IoC containers /
coding styles which register interfaces for viewmodels instead of
concrete types.

Therefore changed Screen generic to IScreen