Updated "ON DELETE" for ref_book_fk and ref_journal_fk in nex_schema.sql.
Reorganizing scripts to help with timing issues.
Fixed #2783.
Added author_seq and started using that for author ids, rather than keeping author_ids from bud.
Merge branch 'master' into expression-tab

Conflicts:
	src/sgd/model/nex/nex_schema.sql
Fixed sequence loading bug. Also fixed author reference loading to use author name rather than author id.
Merge branch 'master' into expression-tab

Conflicts:
	src/sgd/convert/convert_dev.py
Set higher cutoff on expression side graphs.