rosserial_windows - package for building rosserial clients on Windows

I've added the rosserial_windows package for building rosserial_clients for Windows using Visual Studios. There's a tutorial on how to use the library on the ROS wiki http://wiki.ros.org/rosserial_windows/Tutorials/Hello%20World#preview

This is based on Hydro because my current environment is Hydro, but should be an easy port if not identical on Indigo.