Update dungeon.data

Added some more themes, Strongroom and Vault are essentially the same thing so I removed Strongroom.
Would it be possible to add an Adjective alongside the room name, say "Vault of Fears", "Trophy Room of Mirrors", "Toiletry of Snakes", "Well of Water" lol.
Merge pull request #51 from CodoLyoko/patch-1

Update dungeon.data