Selector.pm, Mojo.pod: Minor update in PODs.
Watcher: set version number. minor update in POD.
Add Async::Selector::Aggregator. Add a test for it.
Move t/manifest.t and t/pod.t under xt/. These are author tests.
Change spec of Aggregator: it goes inactive when cancel()ed even when it has no watcher. Use Test::Memory::Cycle to check cyclic references.
t/40-leak.t: use Test::Memory::Cycle to check cyclic references.
Watcher: now it undefs {cb} when it's cancelled. This greatly reduces the risk of creating cyclic references with closures.
t/40-leak.t: add tests about Watcher->cancel() releasing callback.
Add t/55-aggregation_usecase, in which Async::Selector::Aggregator is tested in likely use cases.
Aggregator: set Version. Write SYNOPSIS.
Selector: set version to 1.02.
Watcher: set version to 1.02
Selector, Watcher: udpate copyright statement in POD.
Selector: Add "watcher aggregator" example to POD.
Makefile.PL: update author email.