Tweaked README.
Updated bootstrap nodes.
Added tox-weechat-completion.{h,c}.
Tweaked command /tox, added completion.
Renamed /myaddress to /myid.
Updated usage info.
Implemented tox_weechat_identity_delete.
Inverted function argument (keep_data -> delete_data).
Implemented /tox delete.
Implemented /tox delete command.
Fixed /tox completion.
Added tox_connected_identities and tox_disconnected_identities.
Implemented /tox disconnect.
Fixed connecting/disconnecting.