New: Better interface for creating custom formats

src/NzbDrone.Core/CustomFormats/SpecificationMatchesGroup.cs

@@ -0,0 +1,13 @@
+using System.Collections.Generic;
+using System.Linq;
+
+namespace NzbDrone.Core.CustomFormats
+{
+    public class SpecificationMatchesGroup
+    {
+        public Dictionary<ICustomFormatSpecification, bool> Matches { get; set; }
+
+        public bool DidMatch => !(Matches.Any(m => m.Key.Required && m.Value == false) ||
+                                  Matches.All(m => m.Value == false));
+    }
+}