Render _foo bar baz_ as action messages
Render _foo bar baz_ as action messages

The slack client (and we) change `/me foo bar baz` into a `_foo bar
baz_` message.  Translate those messages back into actions when
displaying them.

Fixes: #61

rawdigits/wee-slack,scharfie/wee-slack,trygveaa/wee-slack,wee-slack/wee-slack,megalithic/wee-slack