Add rake tasks for enabling/disabling saas mode

Gemfile.saas.lock

@@ -1,6 +1,6 @@
 GIT
   remote: https://github.com/basecamp/fizzy-saas
-  revision: 7b096f10526ac797ec9e14314a4752c1482c9152
+  revision: f901a455ecc8c313bdba7be89619d289fa7e112c
   specs:
     fizzy-saas (0.1.0)
       queenbee

bin/rails

@@ -7,4 +7,3 @@ Fizzy.configure_bundle
 require_relative "../config/boot"
 
 require "rails/commands"
-

lib/tasks/saas.rake

@@ -0,0 +1,18 @@
+namespace :saas do
+  SAAS_FILE_PATH = "tmp/saas.txt"
+
+  desc "Enable SaaS mode"
+  task :enable => :environment do
+    file_path = Rails.root.join(SAAS_FILE_PATH)
+    FileUtils.mkdir_p(File.dirname(file_path))
+    FileUtils.touch(file_path)
+    puts "SaaS mode enabled (#{file_path} created)"
+  end
+
+  desc "Disable SaaS mode"
+  task :disable => :environment do
+    file_path = Rails.root.join(SAAS_FILE_PATH)
+    FileUtils.rm_f(file_path)
+    puts "SaaS mode disabled (#{file_path} removed)"
+  end
+end