Fix documentation links by prepending GH Pages site root URL. (#29)

diff --git a/WORKSPACE b/WORKSPACE
index 6282123..5f325e6 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -24,7 +24,7 @@
 git_repository(
     name = "io_bazel_skydoc",
     remote = "https://github.com/bazelbuild/skydoc.git",
-    tag = "0.1.2",
+    tag = "0.1.3",
 )
 
 load("@io_bazel_skydoc//skylark:skylark.bzl", "skydoc_repositories")
diff --git a/docs/index.html b/docs/index.html
index 0526883..fc845b9 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -16,7 +16,7 @@
     <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
     <link rel="stylesheet" href="https://code.getmdl.io/1.1.1/material.green-light_blue.min.css">
     <script defer src="https://code.getmdl.io/1.1.1/material.min.js"></script>
-    <link rel="stylesheet" href="/main.css">
+    <link rel="stylesheet" href="https://bazelbuild.github.io/rules_rust/main.css">
   </head>
   <body>
     <div class="mdl-layout mdl-js-layout mdl-layout--fixed-drawer
@@ -31,38 +31,38 @@
         <nav class="drawer-nav">
           <ul class="drawer-nav">
             
-<li><a href="/index.html">Overview</a></li>
+<li><a href="https://bazelbuild.github.io/rules_rust/index.html">Overview</a></li>
 <li>
-  <a href="/rust/rust.html">Rust Rules</a>
+  <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html">Rust Rules</a>
   <ul>
-    <li><a href="/rust/rust.html#overview">Overview</a></li>
+    <li><a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#overview">Overview</a></li>
     <li>
-      <a href="/rust/rust.html#rust_bench_test">
+      <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_bench_test">
         rust_bench_test
       </a>
     </li>
     <li>
-      <a href="/rust/rust.html#rust_binary">
+      <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_binary">
         rust_binary
       </a>
     </li>
     <li>
-      <a href="/rust/rust.html#rust_doc">
+      <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_doc">
         rust_doc
       </a>
     </li>
     <li>
-      <a href="/rust/rust.html#rust_doc_test">
+      <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_doc_test">
         rust_doc_test
       </a>
     </li>
     <li>
-      <a href="/rust/rust.html#rust_library">
+      <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_library">
         rust_library
       </a>
     </li>
     <li>
-      <a href="/rust/rust.html#rust_test">
+      <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_test">
         rust_test
       </a>
     </li>
@@ -85,7 +85,7 @@
   </ul>
 </nav>
 
-<h2><a href="/rust/rust.html">Rust Rules</a></h2>
+<h2><a href="https://bazelbuild.github.io/rules_rust/rust/rust.html">Rust Rules</a></h2>
 
 <h3>Rules</h3>
 <table class="overview-table">
@@ -96,7 +96,7 @@
   <tbody>
     <tr>
       <td>
-        <a href="/rust/rust.html#rust_bench_test">
+        <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_bench_test">
           <code>rust_bench_test</code>
         </a>
       </td>
@@ -107,7 +107,7 @@
     </tr>
     <tr>
       <td>
-        <a href="/rust/rust.html#rust_binary">
+        <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_binary">
           <code>rust_binary</code>
         </a>
       </td>
@@ -118,7 +118,7 @@
     </tr>
     <tr>
       <td>
-        <a href="/rust/rust.html#rust_doc">
+        <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_doc">
           <code>rust_doc</code>
         </a>
       </td>
@@ -129,7 +129,7 @@
     </tr>
     <tr>
       <td>
-        <a href="/rust/rust.html#rust_doc_test">
+        <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_doc_test">
           <code>rust_doc_test</code>
         </a>
       </td>
@@ -140,7 +140,7 @@
     </tr>
     <tr>
       <td>
-        <a href="/rust/rust.html#rust_library">
+        <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_library">
           <code>rust_library</code>
         </a>
       </td>
@@ -151,7 +151,7 @@
     </tr>
     <tr>
       <td>
-        <a href="/rust/rust.html#rust_test">
+        <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_test">
           <code>rust_test</code>
         </a>
       </td>
@@ -171,7 +171,7 @@
   <tbody>
     <tr>
       <td>
-        <a href="/rust/rust.html#rust_repositories">
+        <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_repositories">
           <code>rust_repositories</code>
         </a>
       </td>
diff --git a/docs/rust/rust.html b/docs/rust/rust.html
index ebd10d1..0fa4af1 100644
--- a/docs/rust/rust.html
+++ b/docs/rust/rust.html
@@ -16,7 +16,7 @@
     <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
     <link rel="stylesheet" href="https://code.getmdl.io/1.1.1/material.green-light_blue.min.css">
     <script defer src="https://code.getmdl.io/1.1.1/material.min.js"></script>
-    <link rel="stylesheet" href="/main.css">
+    <link rel="stylesheet" href="https://bazelbuild.github.io/rules_rust/main.css">
   </head>
   <body>
     <div class="mdl-layout mdl-js-layout mdl-layout--fixed-drawer
@@ -31,38 +31,38 @@
         <nav class="drawer-nav">
           <ul class="drawer-nav">
             
-<li><a href="/index.html">Overview</a></li>
+<li><a href="https://bazelbuild.github.io/rules_rust/index.html">Overview</a></li>
 <li>
-  <a href="/rust/rust.html">Rust Rules</a>
+  <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html">Rust Rules</a>
   <ul>
-    <li><a href="/rust/rust.html#overview">Overview</a></li>
+    <li><a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#overview">Overview</a></li>
     <li>
-      <a href="/rust/rust.html#rust_bench_test">
+      <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_bench_test">
         rust_bench_test
       </a>
     </li>
     <li>
-      <a href="/rust/rust.html#rust_binary">
+      <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_binary">
         rust_binary
       </a>
     </li>
     <li>
-      <a href="/rust/rust.html#rust_doc">
+      <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_doc">
         rust_doc
       </a>
     </li>
     <li>
-      <a href="/rust/rust.html#rust_doc_test">
+      <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_doc_test">
         rust_doc_test
       </a>
     </li>
     <li>
-      <a href="/rust/rust.html#rust_library">
+      <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_library">
         rust_library
       </a>
     </li>
     <li>
-      <a href="/rust/rust.html#rust_test">
+      <a href="https://bazelbuild.github.io/rules_rust/rust/rust.html#rust_test">
         rust_test
       </a>
     </li>
diff --git a/rust/BUILD b/rust/BUILD
index 21e9bb8..9b077ae 100644
--- a/rust/BUILD
+++ b/rust/BUILD
@@ -6,6 +6,7 @@
     name = "rust-docs",
     srcs = ["rust.bzl"],
     format = "html",
+    site_root = "https://bazelbuild.github.io/rules_rust",
 )
 
 config_setting(