Send standard markdown to Finder API

This allows the attachment titles and URLs to be searchable.

Also it makes no sense to send custom markdown to a another service.
Whitespace.
Merge pull request #70 from alphagov/finder-api-plain-markdown

Send standard markdown to Finder API

https://trello.com/c/dQhEjvaM
Fix problematic merge

fast_spec_helper.rb was moved which caused a subsequent merge to fail.