Added  deploy_vw to the Visual Studio Solution.

I added a normally off project to the Visual Studio Solution.
Building it builds a deployment folder containing vw.exe spanning_tree.exe  and the C++ runtimes needed to run on a windows machine that doesn't have Visual Studio 2013 installed.

It can build x86 and x64 builds. It can also build the debug versions but the license restricts distributing them.

Also did some minor tweaks to make span_tree.exe be built in both x86 and x64 versions rather than the old process where which ever release built last won. I've maintained the old folder as well in case someone is using the location for a script, but the results are ambiguous to x86/x64

Details on how to use it are in ReadMe.deploy.txt for want of a better place.