The `if' expression to toggle the display of the `Home' button was
modified; instead of $DOCUMENT_URI (which returns /2015/header.html),
the expression now uses $REQUEST_URI (which returns /2015/ for the
homepage & /2015/sub_page for a sub-page under /2015/).
<div class="container"> <!-- start of container -->
<div class="row">
<div id="lp-nav" class="col-sm-3">
- <!--#if expr='"$DOCUMENT_URI" != "/2015/index.html"' -->
+ <!--#if expr='"$REQUEST_URI" != "/2015/"' -->
<p class="text-center lp-home">
<a class="text-muted" href="/2015/">
<span class="glyphicon glyphicon-chevron-left"></span> Home