Annotation UI/UX

[mikedilger]

I have added the annotation feature on the branch 'annotation'

This is a kind-1 reply, with a tag that indicates it is meant to be interpreted as an annotation. Users can only annotate their own posts.

This issue is for the UI/UX to be reviewed and improved from the basic clunky ugly thing I got to barely work.

We render annotations inside the post itself at the bottom, like this:

EDIT: What I meant to say was....