Not able to make it work for now, artifacts from prior chat view are
visible next to the emoji's because of width being greater than 1.
Filling the width of the cell with spaces didn't work unfortunately.
Neither did clearing the buffer or rewriting the whole screen blank.
This will add:
* An icon for channels
* An icon for groups
* An icon for im channels
It will also add an icon that identifies the presence
of a user.
Fixes#44
Fixes#13
For instance the github integration doesn't have a
discoverable username, so this will become unkown.
Some integrations with attachment fields, title and
text should be tested for the correct order.
