pidgin/pidgin

53fa03701534
Port Pidgin to the new PurpleConversationManager API

Testing Done:
Joined and chat and sent a message as well as a im.

Reviewed at https://reviews.imfreedom.org/r/750/
subdir('libpurple')
subdir('protocols')
if ENABLE_GTK
subdir('pidgin')
else
pidgin_doc = []
endif
if enable_consoleui
subdir('finch')
else
finch_doc = []
endif
alias_target('doc', libpurple_doc, protocols_doc, pidgin_doc, finch_doc)