basic support for multiple cache lists

src/de/geofroggerfx/model/Cache.java

@@ -240,6 +240,23 @@ public class Cache {
     this.found = found;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+
+    Cache cache = (Cache) o;
+
+    if (id != null ? !id.equals(cache.id) : cache.id != null) return false;
+
+    return true;
+  }
+
+  @Override
+  public int hashCode() {
+    return id != null ? id.hashCode() : 0;
+  }
+
   @Override
   public String toString() {
     return "Cache{"