VS2012 project with 3 new features

Hi!

I've made a fork from your project to help you with the work.

I needed to convert the project to the Visual Studio 2012, and I also needed to change some include and lib paths to make my copy complilable.

As you can see those changes are separated to different commits, I hope it will help you to separate them from the new feature implementations.

- I updated the ffmpeg binaries to a much newer one.
- I change the codec to the x264rbg and I made a small modification to the configuration screen to make the user able to select a lossless compression if that's needed.
- I also changed the source to support the following of the foreground window. So now you are free to change the window during playback, it always will record the foreground window if that is selected.

What do you think?