Optional Disable

be able to disable heartbeat with intervalHeartbeat = 0
updated deps
added coverage report

Handling for Quit

optimized tests and event handling on quit

Windows, Error Event

usable from windows
added error event
updated dependencies
better tests

Process-CPU usage + Optional diskspace

Added metric p_cpu to measure the process cpu load
Added optional d_avail with the current free disk space
Trigger beforeMetric even if no metricsKey is defined. So you can grab the data without saving it to redis (eg. writing it to elasticsearch or a queue)

Dependencies

updated dependencies to be used with node 4.2