Sailor Moon aliases

Alias the following:

cere_cere -> cerecere
jun_jun -> junjun
palla_palla -> pallapalla
ves_ves -> vesves
Reason: Same names spelled with a space, and I keep getting them confused.

jun_jun already exists as an artist tag.

(You also forgot to remove that tag from post #1400859.)

Aliased except jun_jun since it's in use.