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
rename rx's to python friendly names
use unsigned int for rx_id's
remove commented out maps
make sure decay constant is a valid number
default to metastable id in half_life functions
c++ style fixes
Merge branch 'ensdf3' of https://github.com/crbates/pyne into crbates-ensdf3
add limits header
Merge branch 'ensdf3' of https://github.com/crbates/pyne into crbates-ensdf3
Fix decay hdf5 datatype
Fix hdf5 compound datatype names
Merge branch 'ensdf3' of https://github.com/crbates/pyne into crbates-ensdf3