Use comment instead of "protected" to denote internal method
Avoid using #inject

I did not use #each_with_object, as the Rogues recommend, for two reasons:

1. I find it just as confusing as #inject.
2. Dotenv still technically supports Ruby 1.8
Doc what is returned from Dotenv.with
Link to Ruby Rogues code reading
Merge pull request #130 from bkeepers/ruby-rogues-feedback

Ruby Rogues feedback