Fix line width

Break lines at 72 char
Corrections in Richting reconstruction

Fix line width, 72 char per line
Put variables in $ $ (e.g. $\Delta$t -> $\Delta t$)
Improved captions to explain more about the figures
Place terms in \emph (terms like shower front)
Use Dutch word for axis in figure
Use \hisparc instad of HiSPARC
Place RouteNet url in footnote
Clarify detector numbering, no detector 0