Make ruler titles customizable

[Sapidianus]

According to the poll I posted here and on reddit a week ago vast majority of players would prefer to have customizable ruler titles. It can be done via namelists or editing option akin to the ones used for leader and empire names.

 

[Vaporous Shadow]

The one problem with that is that VIR (the tutorial robot) refers to you by your title with voice acting. Its a super minor issue, but its there.