checkpoint; pushing branch to github as part of new computer migration
save changes before pulling from github
fix merge conflicts
fix import bugs
checkpoint; working; need to extend mags and simspec file
Added photons to simspec file
refactored pixsim works
cleanup
cleanup
more cleanup; works
Merge branch 'sjb/refactor-newexp' with refactored pixel simulation code.
pixsim-desi works, albeit with a single thread.
fixed merge conflicts