Add user can change monster name

[x3pt]

In case if a user made a mistake on writing monster's name.

[friedger]

I like that fact that the name can't be changed. This way the monsters are more easily recognized. If you are used to interact in a battle with "Bubble" and suddenly it is call "Burst" then I will be confused.

If you made a mistake during creation you could create a new one with the correct spelling.

I could see also a solution that the monster name could be changed until it wakes up the first time.

[leordev]

I think we should add a "name change scroll" item, or something...