Update nuspec for 2016.1.0-beta1.

Author: drieseng

build/nuget/SSH.NET.nuspec

@@ -2,15 +2,15 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
     <metadata>
         <id>SSH.NET</id>
-        <version>2016.0.0</version>
+        <version>2016.1.0-beta1</version>
         <title>SSH.NET</title>
         <authors>Renci</authors>
         <owners>olegkap,drieseng</owners>
         <licenseUrl>https://github.com/sshnet/SSH.NET/blob/master/LICENSE</licenseUrl>
         <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>https://github.com/sshnet/SSH.NET/releases/tag/2016.0.0</releaseNotes>
+        <releaseNotes>https://github.com/sshnet/SSH.NET/releases/tag/2016.1.0-beta1</releaseNotes>
         <summary>A Secure Shell (SSH) library for .NET, optimized for parallelism.</summary>
         <copyright>2012-2016, RENCI</copyright>
         <language>en-US</language>