vcs: Fix slides.
Cleaned up slides, based on the new hand-out. Removed all the commands
and outputs and details of the files being changed, etc.
All these details are to be shown, hands-on, on the terminal.
Richard Stallman%http://www.stallman.org
Eric Raymond%http://www.catb.org/~esr/
Ian Murdock%http://ianmurdock.com/
Lawrence Lessig%http://lessig.org
Linus Torvalds%http://torvalds-family.blogspot.com/
Guido van Rossum%http://www.python.org/~guido/
Larry Wall%http://www.wall.org/~larry/