Fix cmake rpath settings on mac
some e's somehow slipped through and were not converted to np.e
Merge remote-tracking branch 'upstream/staging' into staging

Conflicts:
	pyne/endf.pyx
Merge remote-tracking branch 'upstream/staging' into staging
Merge remote-tracking branch 'upstream/staging' into staging
Merge remote-tracking branch 'upstream/staging' into staging
Merge branch 'staging' of https://github.com/pyne/pyne into mac_rpath
Merge remote-tracking branch 'upstream/staging' into staging
Use rxname for half_life database generation
Merge upstream staging
use rxname instead of string in decay data
update gamma ray test
subsume half_life data into level data
build level data first and use the C++ interface to speedup decay parser
bugfixes
remove old ensdf tools and tests

Also improve branch ratio behavior in edge cases
potential fix for lib python.
updated cmake
python3 urllib compatibility
python3 urlllib fix for nuc_data_make