Create a post_parent field that will only be shown when we have the post type hierarchical
Including the Query_Posts Ajax Request
Creating the Post parents fields depending on the Post Type you've selected
Includes a post_parent choice on the provider
Parsing the post_parents on the posts creation
Adding a check for the split on Post types
Merge pull request #35 from iryz/feature/create_children_posts

Allow `post_parent` to be chosen from the Administration