DIZ enhancements: Read/use SAUCE data, support ANSI, increase max 1->4K

Inspired by Blocktronics (and other ANSI art group) packs' FILE_ID.DIZ/ANS files:
* Support (and prioritize) FILE_ID.ANS
* Convert ANSI color/attribute sequences in DIZ files to Ctrl-A equivalent (uses SAUCE width and ICE color, if specified)
* Don't treat DIZ as a series of lines, they're not always nowadays.
* New putmsg() mode: P_INDENT to print files indented by current column
* Display full (up to 64-char) filenames in lists when using 132+ column terminal.
* Use the Author, Group, and Title fields from the SAUCE if present/non-blank
* 2 new text.dat strings: 301 (FiAuthor) and 302 (FiGroup)
* Also fix bug with repeated Cost header field on bulk-uploaded files.

I know this'll break the *nix build (sauce.c dependency), but I'll fix that next.