Add methods to grab referer domain/path
Visit belongs_to Referer
Simplify referer attr lookup
remove binding.pry
specs for referrer stuffs
Test and account for nil case
Update changelog
Merge branch 'master' into expose_referer_domain_and_path

Conflicts:
	CHANGELOG.md
Slight rework, referer figures out its own stuff
Specs for updated Referer class
Fix migration
visit_referer instead of referer
Merge pull request #14 from enova/expose_referer_domain_and_path

Expose referer domain and path