[docs] update version in header/layout

Rakefile

@@ -189,6 +189,7 @@ task :docs do
     if File.extname(file_name) == '.html'
       # rewrite links with version
       body = File.read(file_path)
+      body.gsub!(/vX.Y.Z/, 'v' << version)
       body.gsub!(/='\//, %{='/} << version << '/')
       body.gsub!(/="\//, %{="/} << version << '/')
       content_type = 'text/html'

docs/_layouts/default.html

@@ -33,7 +33,7 @@
       <a href="/"><img src="/public/images/fog.png" title="fog" /></a>
       <h1>{{ page.title }}</h1>
       <dl>
-        <dt>version</dt><dd>v0.7.2</dd>
+        <dt>version</dt><dd>vX.Y.Z</dd>
         <dt>install</dt><dd><code>gem install fog</code></dd>
         <dt>source</dt><dd><a href="http://github.com/geemus/fog">geemus/fog</a></dd>
       </dl>