Bugfix: Program crashed if correos.es returned HTTP 104
Merge branches 'HTML' and 'master' of https://github.com/mig42/mail-tracker into HTML
Remove format padding and html classes.

Since multiple whitespaces are redundant in html, parameters like {0: ^20} have to be removed as they are useless.
Also, as we're not using style sections in html head, using 'class' parameters in divs doesn't make sense.
Refactor HTML to make it more understandable
Remove 'text' parameter from writers.
Remove unnecessary unicode constant
Rename sample codes. Add separator after unexisting orders.