Adds a short description of the tool...

Part of #6, explains what this tool is.

src/app.js

@@ -7,6 +7,25 @@ import Backlog from "./backlog";
 // FIXME : build configuration?
 const WELL_KNOWN = "https://logs.nix.gsc.io/logs";
 
+const MAN = `
+ofborg-viewer(web)            ofborg web interface           ofborg-viewer(web)
+
+NAME
+    ofborg-viewer — Build logs web interface
+
+DESCRIPTION
+    ofborg-viewer is a web interface that aggregates  the currently in-progress
+    build logs made by ofborg.
+
+    New logs for the given build will  be added to  the discovered logs  at the
+    top if the interface. Clicking them or activating them through the keyboard
+    shortcuts of your browser will show them.
+
+    The log will autscroll when the logger interface is scrolled at the bottom.
+    Scrolling up will stop the autoscroll until scrolled back down.
+
+`;
+
 /**
  * The logger app.
  */
@@ -27,6 +46,10 @@ class App {
 	boot() {
 		window.document.title = "Log viewer starting...";
 		this.gui = new Gui();
+
+		this.log("$ man ofborg-viewer", null, {tag: "ofborg"});
+		this.log(MAN, null, {tag: "man"});
+
 		this.log("→ logger starting", null, {tag: "ofborg"});
 		window.document.title = "Log viewer started...";
 

src/styles/index.less

@@ -1,6 +1,7 @@
 @color_borg: #2D8F34;
 @color_debug: #8F2D87;
 @color_header_bg: #AFFFFF;
+@color_man: #424775;
 @color_header_fg: #005FFF;
 @color_header_selected: #ffffff;
 @colof_header_focus: #DC00B8;
@@ -151,7 +152,7 @@ body {
 	}
 
 	// Specially tagged messages.
-	.ofborg, .stomp {
+	.ofborg, .stomp, .man {
 		border-left: @left_border/2 solid transparent;
 		padding-left: @left_border/2;
 		color: #666;
@@ -167,6 +168,9 @@ body {
 	.stderr {
 		color: #BA3300;
 	}
+	.man {
+		border-left-color: @color_man;
+	}
 
 	// The previous bits of logs.
 	&.backlog {