update json data + variable declaration

reformulate unknown and modify json writes

json-encoded element list (ordered by atomic_num

json-encode ordered elements list

test auth

add type coersion to isotope instantiation, isotope list as element attribute, atomic_weight from std_atomic_weight fallback

add type coersion to isotope instantiation, isotope list as element attribute, atomic_weight from std_atomic_weight fallback

add json export

initial