Fixes location of logo in header
Update base layer to mapbox
Add spacing to bottom of PA page
Corrects vertical alignment for navigation search bar
Navigation bar search works

General improvements to css, as well.
Corrects vertical align for homepage title
Merge branch 'master' into layout-fixes

* master:
  Improves readability of WDPA geometry table standardisation
  Ansible installs zip on servers
  WDPA Release creates the import view on download
  WDPA Release now returns both normal and standardised geometry tables
Fixes width of images for PA explore on home

Allows for use of retina images
Fixes CSS to use correct background image
Logo now links to home page
Fixes map styles previously shared between home and show pages
Merge pull request #24 from unepwcmc/layout-fixes

Small alignment fixes for CSS + working navbar search