create a railtie to have tasks appear automatically

CHANGELOG.md

@@ -1,6 +1,6 @@
 ## 0.2.0
 
-* Add a Rake task
+* Add a Rake task and a default task for Rails
 * Global runner configuration via ~/.jasmine-headless-webkit
 * Custom Jasmine reporter for better user feedback
 * Specify the specs to be run, instead of always running them all

lib/jasmine-headless-webkit.rb

@@ -5,3 +5,5 @@ module Jasmine
   end
 end
 
+require 'jasmine/headless/railtie' if defined?(Rails)
+

lib/jasmine/headless/railtie.rb

@@ -0,0 +1,14 @@
+require 'jasmine/headless/task'
+
+module Jasmine
+  module Headless
+    class Railtie < Rails::Railtie
+      rake_tasks do
+        Jasmine::Headless::Task.new do |t|
+          t.colors = true
+        end
+      end
+    end
+  end
+end
+