Stops people from spamming the "summon narsie" rune to summon him more than once. Fixes #1680.
You can no longer summon narsie more than once, with different runes in different locations.
The narsie rune will move any current narsies, if one exists already.
fixed narsy gender but shh don't tell gia
Merge branch 'master' of https://github.com/tgstation/-tg-station into narsie_spam