Add RIP support to LORD JS and bump version to 5.02

This should get the original RIP stuff working properly.
LORD icon files are ideally handled a bit differently:
1) If the remote supports the SyncTERM cache operations, icons
   are transferred directly to the cache using them.  This requires
   a SyncTERM build including commit e3a280b6.
2) If LORD is running in-process under Synchronet, it will try to
   initiate a YModem-G download for the files using
   bbs.send_file(name, 'G').  This means YModem-G must be enabled,
   and must use the 'G' command key.

Having the *correct* icon files will still work, but they must be
the expected file size and be the same modified date or newer to
be used by LORD JS.

Ideally, there would be a way to configure sexyz or something to
do icon transfers, but that's a lot harder, so I'm not going to
bother.