See http://article.gmane.org/gmane.comp.lang.lua.general/95065
Note that this is incompatible with existing code. You
have to do:
local G = require "guestfs"
local g = G.create ()
ie. give the module your own name ("G" in that example).
- add support for events (with test)
- test progress messages
- update documentation to describe events
- refactor handle closing code
- refactor error code
- use 'assert' in test code instead of 'if ... then error end'
