add Downloads controller and make link in PA show page work
add client-side DownloadModal class
move initialisation of map and downloads to classes
remove unused text in download modal
space after #
remove unused PA helper
prefer iso_3 to id for param in downloads route
Merge branch 'master' into add-download-links

Conflicts:
	app/assets/javascripts/protected_areas.js.coffee
	app/views/layouts/application.html.erb
	app/views/protected_areas/show.html.erb
	test/controllers/protected_areas_controller_test.rb
	test/integration/protected_area_show_test.rb
fix indentation issue after merge with master
Merge pull request #31 from unepwcmc/add-download-links

refactor coffee and add download links