Working front-end form for move submission

On the new_ivanhoe_move.php file, I've created a working form that will accept title and content, and uses wp_insert_post to make that into a move that shows up in the dashboard and all. However, the parent id does not yet seem to be working, so we need to continue working on that.
Merge branch 'feature/move_game_id' of github.com:scholarslab/ivanhoe into feature/move_game_id