Add two properties to `media.model.Attachments.propmap`: `include` and `exclude`, which are aliases for `post__in` and `post__not_in`.

This allows you to instantiate a library that includes and/or excludes specific attachments by passing a single ID or an array of IDs.

Example usage:
{{{
wp.media({frame: 'post', library: {include: [414, 415]}}).open()
wp.media({frame: 'post', library: {include: 414}}).open()
wp.media({frame: 'post', library: {exclude: [414, 415]}}).open()
wp.media({frame: 'post', library: {exclude: 414}}).open()
}}}

Fixes #26587.

Built from https://develop.svn.wordpress.org/trunk@29759


git-svn-id: http://core.svn.wordpress.org/trunk@29531 1a063a9b-81f0-0310-95a4-ce76da25c4cd