pidgin/pidgin

96fc115d6c36
Move PurpleProtocolMediaInterface to its own file.

Also cleaned up a few minor things along the way.

Testing Done:
Compile, docs, didn't update the pot file, but did a voice call between pidgin2 and pidgin3.

Reviewed at https://reviews.imfreedom.org/r/90/
nullclient = executable('nullclient', 'nullclient.c', 'defines.h',
c_args : ['-DSTANDALONE'],
dependencies : [libpurple_dep, glib])