update version to 0.0.5

Merge pull request #3 from art19/clear-timeouts

Also clear the shutdown timer in GracefulServer, even though we're process.exit(0)'ing immediately afterwards. Leaking resources is no bueno.

Stop running the forced shutdown timer when exiting.

update version to 0.0.4

Merge pull request #2 from art19/add-exit-function

Improve documentation, add exitFunction to list of graceful cluster options.

Instead of calling process.exit(0), call a possibly user supplied exit function.

0.0.3

README: add PM2 usage info

fix multiple USR2 signals handling

fix multiple USR2 signals handling

update version to 0.0.2

update README

rename options.workers -> options.workersCount