Camera visualization dropbox created

To make it easier for us to share sample files for visualization I have set up an FTP area where we can read/write files, and have also made the area web-browsable. Details can be found at:

The files can also be browsed at:

http://www.slac.stanford.edu/~lsst-ftp/vis

I have put an example of the set of fits files we expect to be generated from the rafts test stand here:

http://www.slac.stanford.edu/~lsst-ftp/vis/raft-demo/