Use github release for the release notes.

Author: drieseng

build/nuget/SSH.NET.nuspec

@@ -10,125 +10,7 @@
         <projectUrl>https://github.com/sshnet/SSH.NET/</projectUrl>
         <requireLicenseAcceptance>false</requireLicenseAcceptance>
         <description>SSH.NET is a Secure Shell (SSH) library for .NET, optimized for parallelism and with broad framework support.</description>
-        <releaseNotes>2016.0.0-beta3
-==============
-
-New Features:
-
-    * Added support for .NET Core 1.0 (.NETStandard 1.3)
-
-2016.0.0-beta2
-==============
-
-Changes:
-
-    * Improved performance of ScpClient (GitHub issue #21)
-
-Fixes:
-
-    * Terminal width (pixels) is not passed in pty-req
-    * Stopping ForwardedPortDynamic without ever having started would result in a NRE
-
-2016.0.0-beta1
-==============
-
-New Features:
-
-    * Added support for HMAC-SHA512 (hmac-sha2-512 and hmac-sha2-512-96)
-    * Added support for Universal Windows Platform 10 (UAP10.0)
-
-Changes:
-
-    * Overall performance improvements
-    * Relicensed code under MIT license, explicitly permitting reuse within proprietary software
-      provided all copies of the licensed software include a copy of the MIT License terms and the
-      copyright notice
-    * Separated our hash algorithms into SshNet.Security.Cryptography project and package
-    * When available, prefer hash algorithms and encodings from target framework
-    * Refactoring to prepare for upcoming .NET Core support
-
-Fixes:
-
-    * Partial reads from stream assume end (CodePlex issue #1516)
-    * Session.Disconnect() hangs forever (CodePlex issue #2591)
-    * SshData.ReadInt64() is broken (CodePlex issue #2579)
-    * Race condition when SSH_MSG_GLOBAL_REQUEST is received immediately after successful authentication (GitHub issue #8)
-
-2014.4.6-beta2
-==============
-
-New Features:
-
-    * Improved accuracy of IsConnected on .NET
-    * Added support for ssh.com (SSH-2) private keys (issue #1987)
-    * Support an acceptable group of up to 8192 bits for SHA-1 and SHA-256 Diffie-Hellman Group and Key Exchange (issues #1973 and #1777)
-
-Changes:
-
-    * Reduced default buffer size for SftpClient from 64 KB to 32 KB as some SSH servers apply a hard limit of 64 KB at the transport level.
-
-Fixes:
-
-    * SftpClient is throwing undocumented exceptions (issue #2148)
-    * Client channels are no longer closed on dispose (issue #1943)
-    * SftpClient.Exists(string) returns true for a path that does not exist (issues #1952, #1696 and #1574)
-    * ObjectDisposedException when channel is closing (issues #1942 and #1944)
-    * Stack overflow during authentication when server returns same allowed methods after partial success (issue #2399)
-    * SshCommand doesn't cleanup subscribed events (issue #2295)
-    * Lines before protocol identification string are not skipped (issue #1935 and #2223)
-    * ShellStream.ReadLine produces incorrect output when reading multi-byte characters (issue #2190)
-    * SftpClient constructor throws ArgumentException when host contains underscore (issue #1845)
-    * Signing key is missing from source download (issue #2455)
-    * Forwarded Port channels can get stuck waiting (issue #1558)
-    * NullReferenceException when SftpFileStream is finalized after dispose of session (issue #2013)
-    * BlockCipher.Encrypt fails if input message is not padded (issue #2547)
-    * ScpClient: Missing files when using DirectoryUpload (issue #1382)
-    * Dynamic port forwarding slows down to a crawl (issue #2010)
-    * SendKeepAlive causes SocketException when connection is dropped (issue #2029)
-    * SocketException on Dispose or Disconnect (issue #2400)
-    * Sending EOF on wrong channel number (issue #1877)
-    * ForwardedPortDynamic: Unhandled exception if client terminates socket (issue #1844)
-
-2014.4.6-beta1
-==============
-
-New Features:
-
-    * Added callbacks to UploadFile, DownloadFile and ListDirectory in SftpClient (issue #1324)
-    * Allow a given private key file to be used concurrently
-    * Performance improvements:
-        - optimization of payload size for both read and write operations (SftpClient only)
-        - increase window size from 1MB to 2MB
-        - increase buffer size from 16KB to 64KB for SftpClient
-        - take into account the maximum remote packet size of the channel for write operations
-        - increase maximum size of packets that we can receive from 32 KB to 64 KB
-    * Improve exception message for authentication failures
-
-Breaking changes:
-
-    * Assembly name is now Renci.SshNet for all supported frameworks
-    * The Renci.SshNet assemblies for .NET and Silverlight are now strong-named (issue #1802)
-
-Fixes:
-
-    * Incorrect copyright in assemblies (issue #1764)
-    * Remove linefeed from WriteLine method in Shellstream class (issue #1584)
-    * Disable logging of messages in release builds (issue #1767)
-    * Stuck loop on key exchange using arcfour encryption (issue #1922)
-    * Timeout sending data to server with low window size (issue #1706)
-    * No connection possible with the same auth method requested multiple times (issue #1930)
-    * Unobserved exception rethrown by finalizer thread (issue #1298 and #1587)
-    * Client cipher is used to decrypt server messages (issue #1917)
-    * Connection dropped by server due to invalid DSA signature (issue #1918)
-    * Correct casing of Security/Cryptography/HMAC.cs to fix build on Linux (issue #1505)
-    * HTTP proxy hangs (issue #1890)
-    * Wrong parameters to SetSocketOption leads to SocketException under Mono (issue #1799)
-    * Incorrect check for timeout values (issue #1620)
-    * Wrong PKCS7 padding in DES algorithm (issue #1580)
-    * OverflowException on empty server response (issue #1562)
-    * Event handle leak (issue #1761)
-    * SftpFileStream is very slow (issue #1919)
-    * Write access required for private key file</releaseNotes>
+        <releaseNotes>https://github.com/sshnet/SSH.NET/releases/tag/2016.0.0-beta3</releaseNotes>
         <summary>A Secure Shell (SSH) library for .NET, optimized for parallelism.</summary>
         <copyright>2012-2016, RENCI</copyright>
         <language>en-US</language>