Add markdown support for descriptions.
Fix slider to refer to #strecther instead of .stretcher.
Add introduction paragraph.
Allow nil for description: RDiscount failed.
Add basic link-support.
Automatically prepend urls with "http" if not provided.
Website may be nil (is not required)
Scenario: set url from admin
Merge branch 'feature/link' into develop

* feature/link:
  Scenario: set url from admin
  Website may be nil (is not required)
  Automatically prepend urls with "http" if not provided.
  Add basic link-support.
  Allow nil for description: RDiscount failed.