added AnyEvent::Handle, AnyEvent::Socket and AnyEvent::Util modules.
fix a bug in the pure perl backend that kept watchers alive when multiple watchers were registered for the same fh/poll combo.
add a benchmark section showing AnyEvent overhead and comparing the different event loops with each other.
prefer pure perl over tk when autoprobing, as it's about as fast, but doesn't crash with many watchers.
declare Qt support non-experimental.
clarify the confusing section about the file descriptor being kept alive.
document the race between loading of an event module and child processes exiting.
support POE as "backend" (with some caveats, POE is not generic enough, and darn slow).
support Wx and Prima through POE.
optimise perl backend to use 20% less memory and take advantage of typical timeout behaviour. It can now compete with select/poll-based C event loops in most cases (it is usually faster than Event and Glib :).
roughly cut EV memory use in half and increase its speed by 30%, by removing undocumented functionality. Did something similar to other event loops where possible.