Unfortunate require in Rakefile (profile task), affect specs

[dentarg]

In our Rakefile we have a task that does require_relative "lib/twingly/url":

namespace :profile do
  require_relative "profile/profile"

  desc "Profile"
  task :normalize do |task|
    require_relative "lib/twingly/url"

    Profile.measure "normalizing a short URL", 1000 do
      Twingly::URL.parse('http://www.duh.se/').normalized
    end
  end
end

This require could hide problems that we try to catch in our tests, because even if we wont run that particular task, the require is evaluated when doing anything with rake, like running our specs.

[dentarg]

E.g. commenting out require_relative "../url" in lib/twingly/url/null_rull.rb when having the above require in the Rakefile, all NullURL specs passes. They should fail, which they do if the require in the Rakefile is also commented out.

[dentarg]

In #102 I had to move the profile/profile require and make the gemspec not add ruby-prof as an (dev) dependency for the java platform (jruby).

But ruby-prof are problematic even on ruby-head (wont install, see recent travis builds).

I suggest we move the profile stuff to a sub-dir with it's own Gemfile.