Fixed images

Fixed the images of the of the introduction to not overlie.  This seems
to be mostly trial and error with \vspace*{-#cm}
Fixed Graphs in RPM Neutronics

I fixed a couple of graphics and deleted material from the RPM
neutronics sectioin
Edited Light Transport

Edited the light tranposrt simulations slides.
Cleaning up the repositiory

Added to the README, moved files.
Added the introduction back in

Uncommented to add the introduction back in the slide set
Removed backup slides

Removed the backup slides as I couldn't get them to compile and it
wasn't worth the effort.
Spell checked

Spell checked all of the documents