Support sensio distribution bundle v5

Closes #49 with credit to Dmitrii Korotovskii (@korotovsky)

Author: peterjmit

lib/capistrano/dsl/symfony.rb

@@ -39,7 +39,13 @@ def symfony_vendor_path
       end
 
       def build_bootstrap_path
-        symfony_vendor_path.join("sensio/distribution-bundle/Sensio/Bundle/DistributionBundle/Resources/bin/build_bootstrap.php")
+        bootstrap_path = symfony_vendor_path.join("sensio/distribution-bundle")
+
+        if fetch(:sensio_distribution_version).to_i <= 4
+          bootstrap_path = bootstrap_path.join("Sensio/Bundle/DistributionBundle")
+        end
+
+        bootstrap_path.join("Resources/bin/build_bootstrap.php")
       end
 
       def symfony_console(command, params = '')

lib/capistrano/symfony/defaults.rb

@@ -4,6 +4,7 @@
 set :symfony_env,  "prod"
 
 set :symfony_directory_structure, 2
+set :sensio_distribution_version, 4
 
 # symfony-standard edition top-level directories
 set :app_path, "app"