SSH.NET 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:

      * 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