Playbook update: the Capacitor

Hello again!

This update adds The Capacitor to Hello World, a seventh(!) playbook that explores the tenuous line between Order (restore!) and Chaos (crash!). Their special abilities let them focus on terrain manipulation, destructive area effects, boosting their allies, and even using Authority functions on the fly!  They're the wild sorcerers of World, less subtle than the illusionist Wielder playbook by a fair margin.

Let me know what you think of them!