Migrate twitter wrapper to minet

[Yomguithereal]

It was originally in twitwi because gazouilloire also relies on it. But since it makes http calls and such, one could argue it should live within minet? What's more, gazouilloire already relies on minet, so no biggy?

@bmaz, @boogheta what's your take on this?

[boogheta]

this could make sense indeed, I don't have any legitimate objection!