Folded multiple temperatures in to each h5 data file; now im getting 50% less storage required of endf70. yay! Next I think I can get rid of some s(a,b) information, will investigate that and then on to revising openMC so it can read and use this data

openmc/data/data.py

@@ -218,3 +218,7 @@ def atomic_mass(isotope):
         isotope = isotope[:isotope.find('_')]
 
     return _ATOMIC_MASS.get(isotope.lower())
+
+def kT_to_K(kT):
+    K = kT / 8.6173324e-11
+    return K