Update setup to use layout.theme.name instead of page.theme.name if it exists

Author: parkr

_includes/JB/setup

@@ -17,7 +17,11 @@
     {% if site.JB.ASSET_PATH %}
       {% assign ASSET_PATH = site.JB.ASSET_PATH %}
     {% else %}
+      {% if layout.theme.name %}
+      {% capture ASSET_PATH %}{{ BASE_PATH }}/assets/themes/{{ layout.theme.name }}{% endcapture %}
+      {% else %}
       {% capture ASSET_PATH %}{{ BASE_PATH }}/assets/themes/{{ page.theme.name }}{% endcapture %}
+      {% end %}
     {% endif %}  
   {% endif %}
-{% endcapture %}{% assign jbcache = nil %}
+{% endcapture %}{% assign jbcache = nil %}