add db queue file for global db query queues

app/coffee/DbQueue.coffee

@@ -0,0 +1,13 @@
+async = require "async"
+
+queue = async.queue((task, cb)->
+		console.log("running task")
+		task(cb)
+	, 1)
+
+queue.drain = ()->
+    console.log('HI all items have been processed')
+    
+module.exports = 
+	queue: queue
+