Add constantly alias for repeated async loops

dist/utils.js

@@ -18,6 +18,10 @@
     return setTimeout(action, delay);
   };
 
+  global.constantly = function(action) {
+    return every(0, action);
+  };
+
   global.sleep = function(ms) {
     var i, start, _results;
     start = Date.now();

src/utils.coffee

@@ -34,6 +34,15 @@ global.every = (interval, action) ->
 global.after = (delay, action) ->
   setTimeout action, delay
 
+# Public: Alias to the `every` function, but passing 0
+# Examples
+#
+#   constantly -> console.log("hello world (and again and again)!")
+#
+# Returns an interval
+global.constantly = (action) ->
+  every 0, action
+
 # Public: Sleep - do nothing for some duration of time.
 #
 # ms - number of ms to sleep for