Add ability to configure config directories

Fixes #2

README.md

@@ -17,6 +17,8 @@ drupal_settings:
                 database: mydatabase
                 username: user
                 password: secret
+          config_directories: # Optional, Drupal 8
+            sync: path/to/config
           trusted_hosts: # Optional, Drupal 8
             - '^example\.com$'
             - '^.+\.example\.com$'

templates/settings.php.j2

@@ -23,6 +23,12 @@ $base_url = '{{ item.1.settings.base_url }}';
 $settings['hash_salt'] = '{{ item.1.settings.hash_salt }}';
 {% endif %}
 
+{% if item.1.settings.config_directories is defined %}
+{% for name, value in item.1.settings.config_directories.iteritems() %}
+$cconfig_directories['{{ name }}'] = '{{ value }}';
+{% endfor %}
+{% endif %}
+
 {% if item.1.settings.trusted_hosts is defined %}
 $settings['trusted_host_patterns'] = array(
 {% for host in item.1.settings.trusted_hosts %}