Lots of changes to web package

Use go-bindata, html/templates, and lots of other changes to the web
package.

web/server.go

@@ -0,0 +1,12 @@
+package web
+
+import (
+	"github.com/jimeh/ozu.io/shortener"
+	"github.com/valyala/fasthttp"
+)
+
+// NewServer returns a new fasthttp.Server with all routes configured.
+func NewServer(s shortener.Shortener) *fasthttp.Server {
+	r := NewRouter(s)
+	return &fasthttp.Server{Handler: r.HandleRequest}
+}