Add nds fission product yield to nuc_data
Add basic docs to ndsfpy
fixup wimsdfpy doc strings
Add errors to data and split getting and parsing
Add API for NDS data

Add NDS data to the fpyield c++ api and update python api accordingly.
Add NDS error data to API
updated include guards and changes preprend convention
Added amalgamation script
C++ file now alamation compliant.
extra types goes before h5wrap
Fix import ordering in ndsfpy
Add source citation
refactor *_yield to yield_*
Fix compilation issues
Added nuc listing method to mcnp Xsdir
Fix cython API
fix ndsfpy.py import issues
Xsdir.nucs() now returns a set.
Fix C++ API
Add test for ndsfpy data