1) update section_subject_domain_of_sc_relations
2) update section_subject_domain_of_bibliographical_sources
Merge branch 'origin/master'
1) correct errors in section_subject_domain_of_sc_relation
2) add images to section_subject_domain_of_sc_relations
3) create model of section_subject_domain_of_bibliographical_sources
Merge pull request #19 from AlyaSid/master

section_subject_domain_of_sc_relation and section_subject_domain_of_bibliographical_sources
Merge pull request #29 from ShunkevichDV/master

bibliorgaphy sources and relations subject domains updated