Merge branch 'sentry-fix' into 'master'

Wrong number of parameters for configure

Raven.configure doesn't need any parameter, this patch fixes Sentry support.

See merge request !3

config.ru

@@ -5,7 +5,7 @@ Dotenv.load(".env.#{ENV['RACK_ENV']}", '.env')
 
 
 if ENV['RAVEN_DSN']
-  Raven.configure(true) do |config|
+  Raven.configure do |config|
     config.dsn = ENV['RAVEN_DSN']
   end