Change install instructions

Author: brson

app/templates/install.hbs

@@ -4,21 +4,18 @@
 </div>
 
 <p>
-    The easiest way to get Cargo is to get the Rust nightly build by using the
-    <code>rustup</code> script:
+Rust comes with Cargo by default, so the easiest way to get Cargo is to
+<a href='http://www.rust-lang.org/install.html'>install Rust</a> via
+the official binary installers.
 </p>
 
-<pre>
-$ curl -sS https://static.rust-lang.org/rustup.sh | sudo bash
-</pre>
-
 <h2>Only Cargo</h2>
 
 <p>
     To install just Cargo, the current recommended installation method is
     through the official nightly builds. Note that Cargo will also require that
     <a href='http://www.rust-lang.org/'>Rust</a> is already installed on the
-    system
+    system.
 </p>
 
 <div id='install-downloads'>