Update database for 2.5 and 2.6

[bschouwerwou]

Just getting the database updated for the upcoming 2.6 release.

There's a couple of things left that I'll be able to do once 2.6 is out:

• [x] confirm auxiliary drops from new artifact domain
• [x] add new world boss
• [x] use better images

[luaneko]

Actually on second thought, since 2.6 update is happening in less than two days anyway, maybe we'll wait a little bit more...

[bschouwerwou]

@phosphene47 should be good to go now!