Added: Ability to add custom formats, working similar to qualities. (#2669)

Originally called project metis, this feature allows you to do a lot of cool stuff, such as upgrading to a x265 encode, downloading releases with multiple languages, etc. Check out the wiki page at: https://github.com/Radarr/Radarr/wiki/Custom-Formats to learn more! Note: This feature is currently in "beta" and will get more tags and features in the future. Please let me know, if you have any issues and I hope this will allow for a lot of customization!

src/NzbDrone.Core/CustomFormats/CustomFormat.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using NzbDrone.Core.Datastore;
+
+namespace NzbDrone.Core.CustomFormats
+{
+    public class CustomFormat : ModelBase, IEquatable<CustomFormat>
+    {
+        public CustomFormat()
+        {
+
+        }
+
+        public CustomFormat(string name, params string[] tags)
+        {
+            Name = name;
+            FormatTags = tags.Select(t => new FormatTag(t)).ToList();
+        }
+
+        public string Name { get; set; }
+
+        public List<FormatTag> FormatTags { get; set; }
+
+        public override string ToString()
+        {
+            return Name;
+        }
+
+        public static CustomFormat None => new CustomFormat("None");
+
+        public bool Equals(CustomFormat other)
+        {
+            if (ReferenceEquals(null, other)) return false;
+            if (ReferenceEquals(this, other)) return true;
+            return int.Equals(Id, other.Id);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj)) return false;
+            if (ReferenceEquals(this, obj)) return true;
+            if (obj.GetType() != this.GetType()) return false;
+            return Equals((CustomFormat) obj);
+        }
+
+        public override int GetHashCode()
+        {
+            return (Id != null ? Id.GetHashCode() : 0);
+        }
+    }
+}