Fix URL creation on windows

lib/parse/renderer.js

@@ -46,16 +46,11 @@ GitBookRenderer.prototype.link = function(href, title, text) {
     var o = this._extra_options;
     // Relative link, rewrite it to point to github repo
     if(!parsed.protocol && parsed.path && parsed.path[0] != '/' && o && o.repo && o.dir) {
-        href = 'https://github.com/' + o.repo + '/blob' + path.normalize(path.join(
-            '/',
-            o.dir,
-            href
-        ));
-        parsed = url.parse(href);
+        parsed = url.parse('https://github.com/' + o.repo + '/blob/').resolveObject([o.dir, href].join("/"));
     }
 
     // Generate HTML for link
-    var out = '<a href="' + href + '"';
+    var out = '<a href="' + parsed.href + '"';
     // Title if no null
     if (title) {
         out += ' title="' + title + '"';