Add a set of rake tasks for checking settings importability

rakefile

@@ -84,6 +84,14 @@ default_options = {
         args.with_defaults(:env => 'dev', :options => default_options[system])
         sh(django_admin(system, args.env, 'runserver', args.options))
     end
+    
+    Dir["#{system}/envs/*.py"].each do |env_file|
+        env = File.basename(env_file).gsub(/\.py/, '')
+        desc "Attempt to import the settings file #{system}.envs.#{env} and report any errors"
+        task "#{system}:check_settings:#{env}" do
+            sh("echo 'import #{system}.envs.#{env}' | #{django_admin(system, env, 'shell')}")
+        end
+    end
 end
 
 Dir["common/lib/*"].each do |lib|