Behave like an actual blogger

[tra38]

1. The program should run a rake test that will generate a blog post, every night. Ideally, I should use the Ruby gem 'whenever' to accomplish this task.

2. The website should also have a form where people can "subscribe" to receive newsletters, which would show the latest blog posts that the program has written. Undecided whether the newsletters should contain the whole blog post or only a snippet.