QPID-4575: C++ Messaging .NET Binding fixes for Visual Studio 2012
 Rename msvc10 folders to msvcx as they hold files 2010, 2012, ...
 Change projects/solutions to .in templates and cmake configure them.
 Collapse common example csproj files into common template.
 Add cmake BUILD_BINDING_DOTNET option setting.
 Fix up various scripts to accomodate new studio version.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1624604 13f79535-47bb-0310-9956-ffa450edef68