Add stubs for pages that are mentioned in the motd. Slightly modify the donation page to include info from motd

wiki/source/dcss.md

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+---
+title: dcss (dungeon crawl stone soup)
+author: audiodude
+category: software
+---
+connect to [crawl.tildeverse.org](https://crawl.tildeverse.org) to play dungeon
+crawl stone soup, a roguelike game with leaderboards and the ability to
+spectate other players. Also available with full images on the web!