pidgin/pidgin

Remove includes from protocol.h that weren't used there and deal with the fallout

Testing Done:
Compiled and ran locally. Connected with bonjour, xmpp, and irc.

Reviewed at https://reviews.imfreedom.org/r/635/
REVIEWBOARD_URL = "https://reviews.imfreedom.org/"
REPOSITORY = "pidgin/pidgin"
REPOSITORY_TYPE = "mercurial"
BRANCH = "default"
LAND_DEST_BRANCH = "default"
LAND_PUSH = False