feat: 0.14/1.0 tabs, update 1.0 guides index

Author: oddgrd

_includes/header.html

@@ -5,7 +5,8 @@
         <li class="nav-item">
           <a class="navbar-brand" href="/">hyper.rs</a>
         </li>
-        <li class="nav-item"><a class="nav-link" href="/guides">Guides</a></li>
+        <li class="nav-item"><a class="nav-link" href="/stable">1.0 Guides</a></li>
+        <li class="nav-item"><a class="nav-link" href="/guides">0.14 Guides</a></li>
         <li class="nav-item"><a class="nav-link" href="https://github.com/hyperium/hyper">Source</a></li>
       </ul>
     </div>

_layouts/home.html

@@ -9,7 +9,7 @@
       <div class="container">
         <h1 class="hyper-logo">hyper</h1>
         <p>Fast and safe HTTP for the Rust language.</p>
-        <p><a href="/guides" class="btn hyper-getstarted">Get Started</a></p>
+        <p><a href="/stable" class="btn hyper-getstarted">Get Started</a></p>
       </div>
     </section>
     <section class="container">

_stable/index.md

@@ -10,7 +10,7 @@ You can start using it by first adding it to your `Cargo.toml`:
 
 ```toml
 [dependencies]
-hyper = "0.14"
+hyper = { version = "1.0.0-rc.1", features = ["full"] }
 ```
 
 - If building a web server, continue with the [Server guide][].
@@ -19,5 +19,5 @@ hyper = "0.14"
 You could also look at the [generated API documentaton][docs].
 
 [docs]: {{ site.docs_url }}
-[Server guide]: server/hello-world.md
-[Client guide]: client/basic.md
+[Server guide]: server/hello-world
+[Client guide]: client/basic