Curious Edinburgh remedial work

[ianfieldhouse]

• [x] Clean up body text in detail view to remove
  elements
• [x] Add newline character after each additional link
• [x] Remove additioal links header if no links are present
• [x] Add banner with the logo to the about page
• [x] Update about page content
• [x] Update icon
• [x] Update app tint to reflect new logo colour