Add a parser type `text` to WebsiteAgent.
Support for markdown on scenario description.
Ditch Redcarpet in favor of the already in user Kramdown.
Render the (about to be) imported scenario description as markdown.
Properly show "None" for empty sources/receivers.
Merge pull request #452 from PetroFeed/markdown_scenario_description

Support for markdown on scenario description.
Explain the basics of Ruby's regexp and leave a pointer to ruby-doc.org.
Merge pull request #448 from knu/website_agent-text_parser

Add a parser type `text` to WebsiteAgent.
When a dropdown menu opens on hover, apply the style class "open".
Move require's for faraday to the right place.