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.