fixed reference bug
fixed ref_spec.rb
added rspec gem to Gemfile template to make spring work
documented reference types, added migration for reference table update
updated bootstrap and fixtures
updated reference rspecs
working on following
Merge branch 'ref_spec' into advanced-following

Conflicts:
	db/bootstrap/card_acts.yml
	db/bootstrap/card_references.yml
	db/bootstrap/cards.yml
	mod/01_core/set/all/references.rb
	test/fixtures/card_acts.yml
	test/fixtures/card_changes.yml
	test/fixtures/card_references.yml
	test/fixtures/cards.yml
working on following