Photos and country selector is configurable

First cut on making photo and countries in the country selector
on the maps tab configurable with the ENV variable.

. #109
Merge branch 'feature/frontend' of github.com:akvo/akvo-flow into feature/frontend

Fixed conflicts in:
	Dashboard/app/js/lib/views/maps/map-views.js
	Dashboard/app/js/templates/navMaps/nav-maps.handlebars