Added info about testing the notifier

TESTING

@@ -0,0 +1,8 @@
+For Maintainers:
+
+When developing the Hoptaod Notifier, be sure to use the integration test
+against an existing project on staging before pushing to master.
+
+./script/integration_test.rb <test project's api key> <staging server hostname>
+./script/integration_test.rb <test project's api key> <staging server hostname> secure
+

script/integration_test.rb

@@ -23,6 +23,6 @@
   config.host    = host
   config.api_key = ARGV.first
 end
-puts "Sending #{secure or "in"}secure notification to project with key #{ARGV.first}"
+puts "Sending #{secure ? "" : "in"}secure notification to project with key #{ARGV.first}"
 HoptoadNotifier.notify(exception)