Fix version.

Fix version.

build/nuget/SSH.NET.nuspec

@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
     <metadata>
         <id>SSH.NET</id>
-        <version>2016.0.0-beta2</version>
+        <version>2016.0.0-beta1</version>
         <title>SSH.NET</title>
         <authors>Renci</authors>
         <owners>olegkap,drieseng</owners>