made model copy constructor private to force copying to use clone/initfrom
fixed missed iso->nuc id changes
Merge branch 'google_style' of https://github.com/rakhimov/cyclus into rakhimov-google_style
Merge pull request #724 from rwcarlsen/nocopy

made model copy constructor private to force copying to use clone/initfrom
Merge branch 'google_style' of https://github.com/rakhimov/cyclus into rakhimov-google_style
Merge branch 'rakhimov-google_style' into develop
Google style initializer list for files in cyclus/src. Checked files
from a* to composition.*.