Integrate fixes scheduled for 2014.4.6-beta3 ino 2016.0.0-beta1

Integrate fixes scheduled for 2014.4.6-beta3 ino 2016.0.0-beta1
Remove section for 2014.4.6-beta3

Author: drieseng

build/nuget/SSH.NET.nuspec

@@ -30,21 +30,11 @@ Changes:
 
 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-beta3
-==============
-
-New Features:
-
-    * Overall performance improvements
-
-Fixes:
-
-    * Partial reads from stream assume end (issue #1516)
-    * Session.Disconnect() hangs forever (issue #2591)
-    * SshData.ReadInt64() is broken (issue #2579)
-
 2014.4.6-beta2
 ==============