AnyEvent driver for Prima

[Max Maischein]

Hello all,

I have news of progress, and most of it is good.
> In the github repo, Prima implements now the following:
>
> - Prima::File->fd() (along with the existing Prima::File->file)
>
> - Prima::Timer's onTick event will guarantee that it won't be triggered after stop() call (so you won't need destroy() to be bulletproof)

Using that development version, most of the AnyEvent self-tests pass 
(see the github repo, which includes them). The one test that fails is 
the timer test number 05. Marc, correct me if I'm wrong: I think this 
test tests that a timer that is scheduled and immediately forgotten does 
not fire:

   my $timer1 = AnyEvent->timer (after => 0.1, cb => sub { print "ok 
5\n"; $cv->broadcast });

   print "ok 3\n";

   # second timer
   AnyEvent->timer (after => 0.01, cb => sub { print "not ok 5\n" });

   print "ok 4\n";

   $cv->wait;

In my testing with an onDestroy handler for Prima, I see that the 
onDestroy handler for the second timer is also called in the main loop 
($cv->wait). This means to me that something keeps the second timer 
alive, but from what I can test, the reference is not in 
AnyEvent::Impl::Prima...

again, other than this one failure, everything else is skipped 
(Windows+threads joy) or works.

> - Prima::Component->idle_message method added. Calling this method will insert the component (once) to the global idle list,
> and when the loop becomes idle, it's onIdle callback will be called, once, and the the component will be removed from the list.
> However I'm note sure though that I've got the idle semantics right, so if you think that there's something that can be made better,
> do say.
I haven't added that feature yet, so no comment here ;)

-max