Add vault generation details to seed catalog

[flend]

Adds vault generation detail to seed catalog. Information is generally interesting and I use it for vault frequency analysis when trying to balance vault generation probabilities.

Typical output is as follows:

        A vault 1 (Outsourced item -- same item possibilities as in the good permanent item reward room (plus charms), but directly adopted by 1-2 key machines.) [type 8]
        > Guarded by a vault 2 (Mud pit -- key on an altar, room full of mud, take key to cause bog monsters to spawn in the mud) [type 51]
        A vault 3 (Kennel -- allies locked in cages in an open room; choose one or two to unlock and take with you.) [type 10]
        > Guarded by a vault 4 (Nested item library -- can check one item out at a time, and one is a disposable key to another reward room) [type 26]
        >> Guarded by a vault 5 (Guardian obstacle -- a guardian is in the door on a glyph, with other glyphs scattered around.) [type 25]
        A vault 6 (Paralysis trap -- hidden pressure plate with a few vents nearby.) [type 68]
        A vault 7 (Remnant -- carpet surrounded by ash and with some statues) [type 63]

CSV format picks up a 'kind id' only - again for easy summary statistics of vault generation.

TODOs before PR is ready:

• Revert parts of SeedCatalog.c where the format has changed
• Tidy up link list code a bit
• Squash commits