Removed Guerrad previous work on int eff

Removed geurrad previous work because I don't think it added anything to
the discussion.
Removed the conclusions and about this document

Removed the conclusion and about this document from the
DetectorComparison as it didn't add anything to the content.
Fixed Light Transport Timeline

Fixed an error in the light transport timeline which caused the chart to
overlap and be very messy.
Updated timeline to use dates

I had to update to the latest version of pdfgantt, which invloved
installing TexLive 2013.  Then it all worked . . .
Merge branch 'Timetable' into ChapterThree

I am merging timetable into ChapterThree to avoid having such a stupid last chapter.  Also, the deliverables should probably include the timetable.
Combined Timetable into deliverables

I combined the time tables into the delierivables.  In addition the
dependnace on texLive was incormperated into the README
Reworked Chpater 3

I reworked some of the content of Chapter Three, adding a bit more to
the summary part and moving the the architecture bits down a little bit.
Merge branch 'ChapterThree'

Conflicts:
	chapters/chapter-3.tex
Merge branch 'BackMatter'

I want to incoperate the changes to the back matter
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.