All work and no play makes Jack a dull boy

Robots can now take a break and have #play functions instead of #work.
Internally they're treated the same, but it's a fun easter egg!

Example:

Cylon.robot({
  name: 'Jack',

  connections: [],
  devices: [],

  play: function play(my) {
    every((5).seconds(), function() {
      console.log("All work and no play makes %s a dull boy.", my.name);
    });
  }
});

I sincerely apologize for the repeated reference to The Shining, blame
@deadprogram.

Closes #189.

lib/robot.js

@@ -89,7 +89,9 @@ module.exports = Robot = function Robot(opts) {
   this.initConnections(opts.connection || opts.connections);
   this.initDevices(opts.device || opts.devices);
 
-  this.work = opts.work || function() { Logger.info("No work yet"); };
+  this.work = opts.work || opts.play;
+
+  this.work || (this.work = function() { Logger.info("No work yet"); });
 
   for (var n in opts) {
     var func = opts[n],

test/specs/robot.spec.js

@@ -76,6 +76,18 @@ describe("Robot", function() {
     });
   });
 
+  describe("all work and no play", function() {
+    var play = spy();
+
+    var playBot = new Robot({
+      play: play
+    });
+
+    it('makes Jack a dull boy', function() {
+      expect(playBot.work).to.be.eql(play);
+    })
+  })
+
   describe("#data", function() {
     var bot = new Robot({
       connection: { name: 'loopback', adaptor: 'loopback' },