This fleshes out the Review Dialog's documentation, going into how to

manage (edit and delete) comments, write a header/footer, add General

Comments, and a blurb on adding diff/file attachment comments

(referencing the correct docs for those).
Screenshots were added to help show off the different aspects of the

dialog.

Built the docs. No errors, except for references to the General Comments

docs, which don't yet exist (they're in progress).
Checked for spelling errors.
Checked that Retina/non-Retina screenshots were pixel-aligned.