remote theme fix (gdgmanagua#57)

Author: vlmaksime

_includes/head.html

@@ -16,5 +16,5 @@
   <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
 
   <!-- Custom theme css -->
-  <link rel="stylesheet" href="{{ "/css/main.css" | prepend: site.baseurl }}">
+  <link rel="stylesheet" href="{{ "/assets/css/main.css" | prepend: site.baseurl }}">
 </head>

_layouts/default.html

@@ -25,9 +25,9 @@
     <!-- Material Design Lite js Library -->
     <script defer src="https://code.getmdl.io/1.3.0/material.min.js"></script>
     {% if site.pagination_type == 'ops' %}
-    <script rel="javascript" type="text/javascript" src="{{ "/js/site.js" | prepend: site.baseurl }}"></script>
+    <script rel="javascript" type="text/javascript" src="{{ "/assets/js/site.js" | prepend: site.baseurl }}"></script>
     {% endif %}
-    <script rel="javascript" type="text/javascript" src="{{ "/js/search.js" | prepend: site.baseurl }}"></script>
+    <script rel="javascript" type="text/javascript" src="{{ "/assets/js/search.js" | prepend: site.baseurl }}"></script>
     <script rel="javascript" type="text/javascript">
       superSearch({
         searchFile: '/feed.xml',