Xuggle x64 available now - use media engine in x64 SVN

[Itaru]

Looking at the compiled 64-bit xuggler dlls, I noticed that several files are duplicates and these duplicate files can be safely deleted to reduce space. To keep the filenames consistent with the 32-bit xuggler dlls, these are the 10 files that should be deleted which will free up almost 12MB of disk space:
avcodec-52.49.0.dll
avcodec.dll
avdevice-52.2.0.dll
avdevice.dll
avformat-52.48.0.dll
avformat.dll
avutil-50.8.0.dll
avutil.dll
swscale-0.9.0.dll
swscale.dll