…structure.

Initial commit. Gets most things compiling.

…old variables

…ture of new files

…structure

…ectrumLoader. I left some comments of stuff that SBN does that I'm not sure applies here

…anch

…cle levels

…ing SpectrumLoader(Base)

Minor change to trigger doxygen pages (hopefully?)

…tools into feature/source-sink-overhaul

…overhaul

…ce-sink-overhaul"

This reverts commit b7c4525, reversing
changes made to 6395c98.