Update for Pelican v3.7

Fixes #33
diff --git a/plugins/assets b/plugins/assets
index 887049d..2e3e7fc 160000
--- a/plugins/assets
+++ b/plugins/assets
@@ -1 +1 @@
-Subproject commit 887049d504fadea0340a7eb41e44246de3b9aa51
+Subproject commit 2e3e7fc5cc679b56a1405badbfe6451542a443af
diff --git a/requirements.txt b/requirements.txt
index 19bbaa4..7e336cd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
-webassets==0.12.1
 cssmin==0.2.0
-pyScss==1.3.4
+ply==3.10
+pyScss==1.3.5
 slimit==0.8.1
-ply==3.9
+webassets==0.12.1
diff --git a/templates/base.html b/templates/base.html
index 3d69679..d5ff104 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -131,7 +131,7 @@
       <a href="{{ SITEURL }}">Home</a>
 
       {% if DISPLAY_PAGES_ON_MENU %}
-      {% for p in pages %}
+      {% for p in PAGES %}
       {% if p.url != "index.html" %}
       &#124; <a href="{{ SITEURL }}/{{ p.url }}">{{ p.title }}</a>
       {% endif %}