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.
http://www.stallman.org%Richard Stallman
http://www.catb.org/~esr/%Eric Raymond
http://ianmurdock.com/%Ian Murdock
http://lessig.org%Lawrence Lessig
http://torvalds-family.blogspot.com/%Linus Torvalds
http://www.python.org/~guido/%Guido van Rossum
http://www.wall.org/~larry/%Larry Wall