termbox.PollEvent sometimes trigger a panic whil typing in the
input box (#58). I took note from https://github.com/nsf/godit
and implemented and extra event handler that should potentially
handle more events from termbox.
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
In order to fix issue #47 I've added a custom eventstream
to termui that will deregister its own eventstream.
This will ensure me that the events will not be sent to
termui's (unbuffered) event channel and will be picked
up by the buffered termbox channel of slack-term.
Fixes#47
This should alleviate some problems with using the application and
getting the error:
panic: runtime error: slice bounds out of range
However, I'm still able to trigger this event when scrolling
the mouse wheel.
Fixes#47
