[development] Improving theme('username') with inspiration from Facebook

[Konstantin Käfer]

> I think this would be really nice for core and would fit best in  
> profile module. I think linked, possessive, useyou, objective,  
> firstnameonly are some good places to start. But for this to work  
> we'd need a Display Name field (there is a patch for this  
> somewhere) and an optional Gender field for pronoun stuff.

Again: not all languages work like English. French for example has a  
different possessive construction using two words: "le livre de  
kkaefer" instead of "kkaefer’s book".

Konstantin Käfer — http://kkaefer.com/