v0.3.0

This was the version used in the third playtest.

The playtest centered on dealing with an Extraordinary Herb,
the Mangrave. This herb was a hive mind of mobile mangrove
trees, that carried a swamp with them. Animals that died in the
swamp were raised as Fossil undead.

The characters were a Brewer focussing on Might and Resilience potions,
a Ritualist focussed on the barrier circles and time manipulation,
a Projector focussed on Possession, and a Seer focussed on Scrying.

Most things worked very well, though it was concluded that the barrier
to entry for Projection could do with a little lowering.

The playtest also experimentally used the starting XP system later
introduced in 55f844c, which worked
very well.