Add missing Hyper Mode pieces

Some code was missing from the Hyper Mode feature addition. This
completes the use of `Engine.setTimeout` and adds doubleTime check in
button cooldowns.

Closes #374

script/Button.js

@@ -64,7 +64,12 @@ var Button = {
 	cooldown: function(btn) {
 		var cd = btn.data("cooldown");
 		if(cd > 0) {
-			$('div.cooldown', btn).stop(true, true).width("100%").animate({width: '0%'}, cd * 1000, 'linear', function() {
+			milliseconds = cd * 1000;
+			if (Engine.options.doubleTime){
+				milliseconds /= 2;
+			}
+
+			$('div.cooldown', btn).stop(true, true).width("100%").animate({width: '0%'}, milliseconds, 'linear', function() {
 				var b = $(this).closest('.button');
 				b.data('onCooldown', false);
 				if(!b.data('disabled')) {

script/dropbox.js

@@ -121,7 +121,7 @@
                   onChoose: function () {
                     DropboxConnector.log('Save to slot ' + n + ' initiated');
                     // timeout prevents error due to fade out animation of the previous event
-                    window.setTimeout(function () {
+                    Engine.setTimeout(function () {
                       DropboxConnector.log('Save to slot ' + n);
                       DropboxConnector.saveGameToDropbox(n, DropboxConnector.savedtoDropboxEvent);
                     }, 1000);
@@ -150,7 +150,7 @@
                     onChoose: function () {
                       DropboxConnector.log('Load from slot ' + n + ' initiated');
                       // timeout prevents error due to fade out animation of the previous event
-                      window.setTimeout(function () {
+                      Engine.setTimeout(function () {
                         DropboxConnector.log('Load from slot ' + n);
                         DropboxConnector.loadGameFromDropbox(n);
                       }, 1000);

script/state_manager.js

@@ -371,7 +371,7 @@ var StateManager = {
 		if(changed){
 			$SM.fireUpdate('income', true);
 		}
-		Engine._incomeTimeout = setTimeout($SM.collectIncome, 1000);
+		Engine._incomeTimeout = Engine.setTimeout($SM.collectIncome, 1000);
 	},
 
 	//Thieves