Add 'extra_styles' to true base template

tailbone/templates/base.mako

@@ -7,6 +7,7 @@
     <link rel="icon" type="image/x-icon" href="${request.static_url('tailbone:static/img/rattail.ico')}" />
     ${self.core_javascript()}
     ${self.core_styles()}
+    ${self.extra_styles()}
     ${self.head_tags()}
   </head>
 
@@ -158,4 +159,6 @@
   ${h.stylesheet_link('https://code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.min.css')}
 </%def>
 
+<%def name="extra_styles()"></%def>
+
 <%def name="head_tags()"></%def>

tailbone/templates/home.mako

@@ -3,8 +3,8 @@
 
 <%def name="title()">Home</%def>
 
-<%def name="head_tags()">
-  ${parent.head_tags()}
+<%def name="extra_styles()">
+  ${parent.extra_styles()}
   <style type="text/css">
     .logo {
         text-align: center;