Add Frontend Support for annotations on timeline

[Rperry2174]

trafficstars

Most charting libraries have a way to annotate data. We should make it so that if you want to specifically annotate something special at a particular timestamp, that you can click on the timeline graph and add that annotation

[wusphinx]

Most charting libraries have a way to annotate data. We should make it so that if you want to specifically annotate something special at a particular timestamp, that you can click on the timeline graph and add that annotation

It's better to show timestamp when I click on the timeline

[Rperry2174]

Here is how honeycomb's looks -- i like the little pin at the top: