#7 Fix sass settings

templates/sass/_settings.scss.twig

-{% if bower_assets.bootstrap-sass.fonts is defined %}
+// Do not edit this file, it's auto generated and updated by composer.
+{% if bower_assets['bootstrap-sass'].fonts is defined %}
+
 // Set the directory for the Bootstrap Glyphicon font.
 $icon-font-path: '../fonts/bootstrap/';
 {% endif %}
+{% if bower_assets['flat-ui'] is defined %}
 
-{% if bower_assets.flat-ui is defined %}
 // Workaround for Flat-UI issue with node-sass:
 // @see https://github.com/wingrunr21/flat-ui-sass/issues/39
 @function tint($color, $percentage){
   @return mix(#fff, $color, $percentage)
 }
-{% if bower_assets.flat-ui.fonts is defined %}
+{% if bower_assets['flat-ui'].fonts is defined %}
 // Set the directory for the Flat-UI Glyphicon font.
 $icon-font-path: '../fonts/flat-ui';
 $icon-font-name: 'flat-ui-icons-regular';
 {% endif %}
+{% endif %}
+{% if bower_assets['animate-sass'].sass is defined %}
 
-{% if bower_assets.animate-sass.sass is defined %}
 // Enable the animate modules
-{% for module in bower_assets.animate-sass.sass.modules|default([]) %}
+{% for module in bower_assets['animate-sass'].sass.modules|default([]) %}
 $use-{{ module }}: true;
 {% endfor %}
 {% endif %}