Added 'Save Artwork' toolbar button

TagTunes/SearchResult.swift

@@ -10,7 +10,7 @@ import Cocoa
 
 /// Represents an `Album` returned fromm the
 /// [Search API](https://www.apple.com/itunes/affiliates/resources/documentation/itunes-store-web-service-search-api.html).
-public class SearchResult: Equatable {
+public class SearchResult {
 
     public let id: iTunesId
     
@@ -44,6 +44,14 @@ public class SearchResult: Equatable {
     
 }
 
+extension SearchResult: Hashable {
+    
+    public var hashValue: Int {
+        return Int(id)
+    }
+    
+}
+
 extension Album {
     
     public convenience init(searchResult: SearchResult) {
@@ -54,12 +62,4 @@ extension Album {
 
 public func ==(lhs: SearchResult, rhs: SearchResult) -> Bool {
     return lhs.id == rhs.id
-}
-
-public func ==(lhs: SearchResult, rhs: Album) -> Bool {
-    return lhs.id == rhs.id
-}
-
-public func ==(lhs: Album, rhs: SearchResult) -> Bool {
-    return lhs.id == rhs.id
 }