Remove time from Slack payload

I don't think it's needed, as we have the time we received the notification in
Slack.
Write likelihood before anomaly score.
Added URL parameters explanation

Also did some minor fixes to other parts of the text.
Send two types of notifications

We notify if entering in an anomalous state and if leaving an anomalous state.
Parametrize docker host
Added information about `id` URL parameter

Added an `id` parameter to be used to focus on chart of given `ìd`.
This will be useful when giving direct links to anomalous monitors when posting
anomalies.
Set initial cell width based on columns number

We are now drawing plots while creating graph table, giving a more responsive
page. But for that we need to set earlier the .cell-chart width.
Removed createPlot comment
Refatored divs IDs to allow focusing via parameter

We renamed the cells IDs to use the actual monitor IDs, allowing us to receive
a URL parameter named `id` with which we can focus on this given ID chart.

This will be useful when posting anomalies, because we will be able to give a
direct link to the anomalous chart.

We also made some changes to initially draw the plots while creating the table,
so the page looks more responsive now.
Remove debug lines.
Added `domain` key to config files

It defauts to localhost and is used to link back anomalous charts when posting
anomalies to webhooks.
Added explanation about new `domain` parameter
Print newline after response
Smaller Slack payload with URL to chart

I'd also to remove threshold settings logging, because now I'm using None when
no value is given.
Replacing steelblue by royalblue.
Fix cell hover border.