(+) CTL-99 Added extensions methods for the IViewModelManager to allow the closing of all view models that match a specified predicate
(x) CTL-128 Problem with navigation in WinRT apps
(+) Added support to Commit enqueued tasks using an existing instance view model for SplashScreenService
(x) Removed the usage of the DispatcherService to execute a task in SplashScreenService to allow smoothly notification of the task progress
SplashScreenService is registered as Transient in ServiceLocator and is now available for SL projects
Updated code snippets
Minor performance improvements in generic argument checks
Removed unnecessary call in Argument.expression.cs
(+) Added extension method for ISplashScreenService for Prism to show progress control in a region
Merge branch 'SplashScreenService' into develop
Added missing file.
Merge branch 'SplashScreenService' into develop
Added completed callback to ISplashScreenService extensions methods for Prims.
Merge branch 'SplashScreenService' into develop
(x) Ensured the value of Owner property of Shell to NULL in order to avoid the application close  when the SplashScreenService done
(x) Ensured Bootstrapper UI tasks calls using DispatcherService
Merge branch 'SplashScreenService' into develop
Small improvements
Merge branch 'SplashScreenService' into develop
Working on TaskCommand async logic.
Merge pull request #6 from inTagger/feature/async-task-command

(+) CTL-135: Merging pull request #6: TaskCommand