Added basic column density code
Destructor causing issues - removed for now
Treats densities outside the grid as those of the closest boundary
changed truncation to rounding
Inital photon positions now correct for zero angle case
Start move to vector for coords, fixed direcion calc
updated readme with some basic info
Added column density projections
make photon ray tracing more robust and neater
corrected inital photon placement
column density and scatter images now have different names
moved column density calculations to within Image
parallelized column density calculation
untracked changing prob files