Completele replace evil client with http, saving initial interface and backward compatibility

Gemfile

@@ -15,4 +15,5 @@ group :development, :test do
   gem "rubocop", "~> 1.21"
   gem "rubocop-rake", "~> 0.6.0"
   gem "rubocop-rspec", "~> 2.5"
+  gem "webmock", "~> 3.14"
 end