Improve skeleton for rdf write
Add another hint to skeleton for rdf write
Qualify py.test with key
Remove 'large files' instructions for first delivery to save time
Merge branch 'master' into author_answers

Conflicts:
	data/fileformats/instructions.md
	data/fileformats/reactions/formats/format_rdf.py
Fix silly bug in untested scaffold
RDF test should have RDF name
Tidying up of instructions file
Merge branch 'master' into author_answers

Conflicts:
	data/fileformats/instructions.md