Fix checkout total display

spec/javascripts/unit/darkswarm/services/shipping_methods_spec.js.coffee

@@ -0,0 +1,14 @@
+describe "Shipping method service", ->
+  ShippingMethods = null
+  shippingMethods = [
+    {id: 1, price: "1.2"}
+  ]
+
+  beforeEach ->
+    module 'Darkswarm'
+    angular.module('Darkswarm').value('shippingMethods', shippingMethods)
+    inject ($injector)->
+      ShippingMethods = $injector.get("ShippingMethods")
+
+  it "converts price to float", ->
+    expect(ShippingMethods.shipping_methods[0].price).toEqual 1.2