Test vibe.d initial commit.

- Now ready for tutorial section: "Incremental updates"

.gitignore

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+.dub
+docs.json
+__dummy.html
+*.o
+*.obj

dub.sdl

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+name "webchat"
+description "A simple vibe.d server application."
+copyright "Copyright © 2016, johnno"
+authors "johnno"
+dependency "vibe-d" version="~>0.7.23"
+versions "VibeDefaultMain"

dub.selections.json

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+{
+	"fileVersion": 1,
+	"versions": {
+		"libasync": "0.7.5",
+		"memutils": "0.4.4",
+		"openssl": "1.1.4+1.0.1g",
+		"vibe-d": "0.7.26",
+		"libevent": "2.0.1+2.0.16",
+		"libev": "5.0.0+4.04"
+	}
+}

source/app.d

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+/**
+Following along the tutorial at
+https://vibed.org/blog/posts/a-scalable-chat-room-service-in-d
+
+More notes at https://wiki.jon.geek.nz/D
+
+Add the D apt respository in /etc/apt/sources.list.d/dlang.list:
+
+    deb http://netcologne.dl.sourceforge.net/project/d-apt/ d-apt main
+
+Then get the apt key, and install the things:
+
+    sudo apt-get update
+    sudo apt-get -y --allow-unauthenticated install --reinstall d-apt-keyring
+    sudo apt-get install dmd-bin dcd dub
+*/
+
+import vibe.d;
+
+final class Room {
+    string[] messages;
+
+    void addMessage(string nick, string message) {
+        messages ~= nick ~ ": " ~ message;
+    }
+}
+
+final class WebChat {
+    private Room[string] rooms;
+
+    // Uses vibe.d magic method names - in this case, GET /
+    void get() {
+        render!("index.dt");
+    }
+
+    // Uses vibe.d magic method names - in this case, GET /hello
+    void getHello() {
+        render!("hello.dt");
+    }
+
+    // GET /room
+    void getRoom(string room, string nick) {
+        auto messages = getOrCreateRoom(room).messages;
+        render!("room.dt", room, nick, messages);
+    }
+
+    // POST /room
+    void postRoom(string room, string nick, string message) {
+        if (message.length)
+            getOrCreateRoom(room).addMessage(nick, message);
+        redirect("room?room=" ~ room.urlEncode ~ "&nick=" ~ nick.urlEncode);
+    }
+
+    private Room getOrCreateRoom(string room) {
+        if (auto pr = room in rooms) return *pr;
+        return rooms[room] = new Room;
+    }
+}
+
+shared static this()
+{
+    auto router = new URLRouter;
+    router.registerWebInterface(new WebChat);
+
+    // If nothing else matches, try serving it from public
+    router.get("*", serveStaticFiles("public/"));
+
+	auto settings = new HTTPServerSettings;
+	settings.port = 8083;
+	settings.bindAddresses = ["::1", "127.0.0.1"];
+	listenHTTP(settings, router);
+
+	logInfo("Please open http://127.0.0.1:%d/ in your browser.".format(settings.port));
+}

views/hello.dt

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+doctype html
+html
+  head
+    title HELLO
+  body
+    h1 HELLO

views/index.dt

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+doctype html
+html
+  head
+    title Welcome to Webchat
+  body
+    h1 Welcome to Webchat
+    p Choose a chatroom:
+    form(action="/room", method="GET")
+      p
+        label(for="room") Chat room:
+        input#room(name="room", type="text", autofocus="true")
+      p
+        label(for="nick") Your Name:
+        input#nick(name="nick", type="text")
+      button(type="submit") Go

views/room.dt

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+doctype html
+html
+    head
+        title #{room} - Webchat
+        style.
+            textarea, input { width: 100%; }
+            textarea { resize: vertical; }
+    body
+        h1 Room '#{room}'
+        textarea#history(rows=20, readonly=true)
+            - foreach (m; messages)
+                |= m
+
+        form(action="room", method="POST")
+            input(type="hidden", name="room", value=room)
+            input(type="hidden", name="nick", value=nick)
+            input#inputLine(type="text", name="message", autofocus=true)
+