pidgin/pidgin

Create a new ContactList that will eventually fully replace PidginBuddyList

Create a new PidginContactList window and move the application actions to PidginApplication.

Testing Done:
* Verified menus are properly disabled while offline
* Verified menu items that require a protocol with chats enables the chat menu items as well as the room list menu items
* Verified that the menu items can become enabled while the menus are opened
* Verified that the application actions are activatable via dbus
* Verified that the plugin manager action was migrated successfully
* Verified that the account manager action was migrated successfully

Reviewed at https://reviews.imfreedom.org/r/174/
if ENABLE_DOC
subdir('reference')
endif
if ENABLE_GTK
pidgin_man = configure_file(
input : 'pidgin3.1.in',
output : 'pidgin3.1',
configuration : man_conf,
install : true,
install_dir : get_option('mandir') / 'man1')
endif
if enable_consoleui
finch_man = configure_file(
input : 'finch3.1.in',
output : 'finch3.1',
configuration : man_conf,
install : true,
install_dir : get_option('mandir') / 'man1')
endif