Enable submitting inline comments

Summary:
Added a --attach-inlines option to aoncmd_comment.py that, when provided, will
cause arcyon to also attach any inline comments to the submission.

Test Plan:
given a comment with any inline comments, run arcyon comment id
--attach-inlines --action comment, and the comment should be submitted along
with the inline comments.  Running without will not submit the inline comments.

Reviewers: jevripio, jfalgout

Reviewed By: jevripio