added mulitple code recognition for dividing camp badges

x = phage badge
y = backer badge
a = reserved for future use

All phage badges transmit x, and will accept pages from x, y, and a.

Backer badges will transmit y (hard-coded, one-time change), and
accept pages from x, y, and a.

The receivers for Sean's brain controller will need to have a modded
code base that only repsonds to x or y or a, but for now we're all
one big happy family.