Now generating unique ids for queue items sent to the api.

src/NzbDrone.Common/Crypto/HashConverter.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace NzbDrone.Common.Crypto
+{
+    public static class HashConverter
+    {
+        private static SHA1 HashAlgorithm = SHA1.Create();
+
+        public static int GetHashInt31(string target)
+        {
+            var hash = HashAlgorithm.ComputeHash(Encoding.Default.GetBytes(target));
+
+            return BitConverter.ToInt32(hash, 0) & 0x7fffffff;
+        }
+    }
+}