pidgin/pidgin

Refresh the README as a few things have moved and some of the wording was weird.

2021-03-19, Gary Kramlich
b09ca0df70cb
Refresh the README as a few things have moved and some of the wording was weird.

Testing Done:
Read it a few times.

Reviewed at https://reviews.imfreedom.org/r/568/
nullclient = executable('nullclient', 'nullclient.c', 'defines.h',
c_args : ['-DSTANDALONE'],
dependencies : [libpurple_dep, glib])