Styled protected areas page
Merge branch 'redesign' into protected-area-design

* redesign:
  Always show map zoom control
  Removes old layout from home page
  Link to home page!
  Repair footer after I broke it
  Moves colours to correct component vars
  Improves semantics of CSS
  Slight simplification of map layer code
  Styles leaflet controls
  Retina mapbox search tiles
  add MAPBOX_ACCESS_TOKEN to .env.example
  fix active_token class variables
  Mocks search class
  remove unneded test for PAs and wikipedia summaries
  ES index creation uses batches again
  use covers in search results
  add helper methods for covers
  Link to PA from map search results
  Show the Protected Areas on a map

Conflicts:
	app/assets/stylesheets/colors.css.scss
Correct colours for PA page
Merge pull request #151 from unepwcmc/protected-area-design

Styled protected areas page