remove megadrop

it's not used anymore in the new design, so let's say bye bye.
text blocks: add contact_info text block template
contact_messages: start redesign and make use of contact_info text block
Merge branch 'feature/30-website-redesign' of github.com:sjockers/teikei-1 into 30-website-redesign

Conflicts:
	app/views/contact_messages/new.html.haml
contact_messages/new: add more styling