Merge branch 'pyfisch-patch-3'

Update tcell

Fixes zyedidia#2081

Update runtime

Update keybinding docs

Also updates the pane type of `info` to `command` which is a more
descriptive name.

Slight performance improvement

Update plugin documentation

Clean default settings in micro -clean

Fix dropped redraw events (zyedidia#1675)

If screen.Redraw() is called very quickly after a key or mouse event,
it may send the redraw event while micro is not waiting for it but
still processing the key or mouse event. Since drawChan is non-buffered
and at the same time non-blocking, this redraw event will be simply lost,
so the screen content will not be up-to-date.

Update runtime

Update runtime