Revert "Add VS 2012 and VS 2013 versions of libprotobuf.lib"

This reverts commit 28abc2120b8718eb36f7c47f6b20ef7230bc5914.
Revert "Revert "Add VS 2012 and VS 2013 versions of libprotobuf.lib""

This reverts commit caf7e2772822efb9495b24a3096e0ab7067de091.