Add Span All Monitors option

[gregmac]

Adds a new "Span single video across all monitors" option.

• This picks the outer bounds of all monitors, then proportionally resizes the video to fit inside.
  • This means in the case of two side-by-side monitors (seen below), for example, the top and bottom of the video is cut off

• Replaces DifferentMoviesOnDual and MultiscreenDisabled settings with MultiMonitorMode
  • Old settings are migrated to new mode
  • Old registry keys removed upon saving settings

• Refactors main invocation code to simplify different modes

Implements #133

[wildpash]

Hi Greg, is there a possibility to download that 6.2 Release? The download Section only contains the working: Aerial Screen Saver v6.1 Exe The Aerial.exe in the Master Release Folder crash at start.

Anwendung: Aerial.exe Frameworkversion: v4.0.30319 Beschreibung: Der Prozess wurde aufgrund einer unbehandelten Ausnahme beendet. Ausnahmeinformationen: System.ArgumentNullException bei System.IO.Path.Combine(System.String, System.String) bei Aerial.Caching.IsHit(System.String) bei Aerial.AerialContext.GetAllEntries() bei ScreenSaver.ScreenSaverForm.ScreenSaverForm_Load(System.Object, System.EventArgs) bei System.Windows.Forms.Form.OnLoad(System.EventArgs) bei System.Windows.Forms.Form.SetVisibleCore(Boolean) bei System.Windows.Forms.Control.set_Visible(Boolean) bei System.Windows.Forms.Application+ThreadContext.RunMessageLoopInner(Int32, System.Windows.Forms.ApplicationContext) bei System.Windows.Forms.Application+ThreadContext.RunMessageLoop(Int32, System.Windows.Forms.ApplicationContext) bei System.Windows.Forms.Application.Run(System.Windows.Forms.Form) bei Aerial.Program.Main(System.String[])