API: Changed "parent_id" to "conversation_id" since that reflects better the meaning of this programming.
API: Changed "parent_id" to "conversation_id" since that reflects better the meaning of this programming.

friendica/friendica,fabrixxm/friendica,tugelbend/friendica,cutec-chris/friendica,friendica/friendica,strk/friendica,annando/friendica,fabrixxm/friendica,annando/friendica,friendica/friendica,cutec-chris/friendica,cutec-chris/friendica,dissolve/friendica,fabrixxm/friendica,tobiasd/friendica,dissolve/friendica,friendica/friendica,annando/friendica,strk/friendica,tobiasd/friendica,annando/friendica,tugelbend/friendica,tobiasd/friendica,tugelbend/friendica,dissolve/friendica,dissolve/friendica,fabrixxm/friendica,tugelbend/friendica,tobiasd/friendica,annando/friendica,friendica/friendica,strk/friendica,dissolve/friendica,strk/friendica,strk/friendica,fabrixxm/friendica,tobiasd/friendica,cutec-chris/friendica,tugelbend/friendica