Remove the website/ folder prefix

We should make sure that the Rails project is deployed directly
into release_path since too much code depends on that.
Add a custom Git subfolder deployment strategy
Remove unnecessary require statements

Since all tasks in fetch.rake depend on the :environment task that means
the entire application environment will be loaded and available for each
task. In other words, all gems from the Gemfile will be already loaded
by the code on line 7 of application.rb.

Leaving the require statements creates problems such as attempting to
require sqlite3 in production, whereas it is only used and available on
development.