added new cover layers
added coverage layers in legend
Merge branch 'develop' of github.com:Vizzuality/gfw into refactor/coverage-layers

* 'develop' of github.com:Vizzuality/gfw:
  analysis area when layer changes
  fix stories
Merge branch 'refactor/coverage-layers' into develop

* refactor/coverage-layers:
  added coverage layers in legend
  analysis area when layer changes
  added new cover layers