Initial commit
changed names
started intro
Added intro lecture
updated 00 and 01.
starter files.
Updated materials.
added nuclear data notebook
updated reaction names
updated data sources
updated cross sections
rm'd endf reader
more updates
added meshes
updated files
added status to itself.
Fix typos in the intro
Fix typos in 01-nuclide-naming
fix numpy import in 05-cross-sections

The import for numpy as after the first call to it
Spelling fixes for 06 and 07