Redirect gh-pages to docs.rs

docs/404.html

@@ -0,0 +1,3 @@
+<meta http-equiv="refresh" content="0; url=https://docs.rs/url/*/url/">
+<link rel="canonical" href="https://docs.rs/url/*/url/">
+<a href="https://docs.rs/url/*/url/">Moved to docs.rs</a>

docs/index.html

@@ -0,0 +1,3 @@
+<meta http-equiv="refresh" content="0; url=https://docs.rs/url/*/url/">
+<link rel="canonical" href="https://docs.rs/url/*/url/">
+<a href="https://docs.rs/url/*/url/">Moved to docs.rs</a>