Added RPM Light Transport GEANT4

Added the section of how I plan to do the light transport simulations
in GEANT4 of the RPM
Merge branch 'master' into ChapterTwo

Bringing the second branch up to date
Added an image of a gamma event in the energy dep

Added an image of 10 photons on a 2 cm detector that was simulated with
the OptEnergyDeposition tools of the GEANT4 simulation.
Added the missing figure

The missing figure was geneted using MCNP/RPMOptimziation/FluxProfile
I am not sure if the positions are exactly correct, but it seems to be
close enought for goverment work.
Adding the Chapter 2 commits

I think I added the chapter 3 commits last time. Oops