Use web root for navigation links

Makefile

@@ -10,6 +10,7 @@ tup:
 	tup build
 
 preview: tup
+	rm -rf preview
 	cp -r build preview
 	rm -f preview/tup.config
 

Tuprules.tup

@@ -1,9 +1,9 @@
 &root = .
 !pandoc = | &(root)/templates/footer.html |> pandoc --from markdown --to html \
 	--template=&(root)/templates/pandoc.html \
+	--variable=webRoot:&(root) \
 	--css &(root)/css/default.css \
 	--include-in-header=&(root)/templates/header.html \
-	--include-before-body=&(root)/templates/nav.html \
 	--include-after-body=&(root)/templates/footer.html \
 	%f --output=%o \
 	|> %B.html

templates/pandoc.html

@@ -45,6 +45,14 @@ $endfor$
 $for(include-before)$
 $include-before$
 $endfor$
+
+<div id="banner"></div>
+<div id="navigation">
+  <a href=$webRoot$/index.html>Home</a>
+  <a href=$webRoot$/projects.html>Projects</a>
+  <a href=$webRoot$/about.html>About</a>
+</div>
+
 $if(title)$
 <header id="title-block-header">
 <h1 class="title">$title$</h1>