Add error handling to dns-resolver example
Basic benchmark scripts
Increase period of periodic timers
Add warning if xdebug is loaded
Introduce convenience factory method for BufferedSink

This makes the API way more usable:

    BufferedSink::createPromise($readable)
        ->then($callback);
Remove specific CHANGELOG date
Merge pull request #160 from reactphp/buffered-sink-factory

Introduce convenience factory method for BufferedSink
[Benchmark] Update 1000 to variable for users to adjust
Merge branch 'refs/heads/bench'