Skillchains Extension 0.9.0 Released

It's been a while since I've released a new version, so here it is.

This release contains one new feature: the ability to select multiple weapons for a given player. A version 0.9.1 will allow you to sign individual skill levels for the weapons.

This version also does what I threatened to do ages ago: support for versions of Firefox prior to 1.0 is dropped.