Add Module HideUserName

Idea from UserVoice 
https://shurscript.uservoice.com/forums/245811-general/suggestions/6107390-modo-inc%C3%B3gnito-para-forear-seguros-con-gente-delan

Más UserVoice con lo mismo https://shurscript.uservoice.com/forums/245811-general/suggestions/5833745-ocultar-nick

https://github.com/TheBronx/shurscript/pull/56
(Perdonar antes que se me ha ido..)