change jade references to pug

TODO

@@ -0,0 +1,12 @@
+Implement better mount system differentiating bays and hardpoints.
+
+Add GUI.
+
+Improve spawning system.
+
+Add structures.
+	Add Wingbases.
+		Add spawning from Wingbases.
+	Add automated turrets.
+
+Add ammo.

package.json

@@ -20,9 +20,9 @@
     "commander": "^2.9.0",
     "escape-html": "^1.0.3",
     "express": "^4.13.4",
-    "jade": "^1.11.0",
     "nib": "^1.1.0",
     "poly-decomp": "git://github.com/schteppe/poly-decomp.js.git",
+    "pug": "^2.0.0-beta3",
     "recursive-readdir": "^1.3.0",
     "socket.io": "^1.4.5",
     "socket.io-client": "^1.4.5",

public/views/error/error.pug

@@ -1,4 +1,4 @@
-extends ../layout.jade
+extends ../layout.pug
 
 block head
 

public/views/game.pug

@@ -1,4 +1,4 @@
-extends layout.jade
+extends layout.pug
 
 block head
 	title
@@ -15,4 +15,4 @@ block body
 	canvas#wingbase_canvas
 		| Sorry, your browser does not currently support HTML5 Canvas.
 	#gui
-		include gui/gui.jade
+		include gui/gui.pug

public/views/index.jade

@@ -1 +0,0 @@
-include game.jade

public/views/index.pug

@@ -0,0 +1 @@
+include game.pug

server/web/index.js

@@ -19,8 +19,8 @@ class WebServer {
 		let app = this.app;
 
 		app.set('views', 'public/views');
-		app.set('view engine', 'jade');
-		app.engine('jade', require('jade').__express);
+		app.set('view engine', 'pug');
+		app.engine('pug', require('pug').__express);
 
 		app.use(stylus.middleware({
 			src: 'public/stylus',