Added Micrometer support

And through micrometer, you can now monitor AppOptics, Atlas, Datadog, Dynatrace, Elastic, Ganglia, Graphite, Humio, Influx, JMX, KairosDB, New Relic, Prometheus, SignalFx, StatsD, Wavefront.

Spring uses Micrometer as its monitoring tool.

https://micrometer.io/docs

Added statsd, and new relic implementations

added statsd, newrelic implementations. added more examples and fixed javasimon implementation

Initial release

aspectj pointcuts and swappable monitoring implementations for monitoring java classes, methods and exceptions. You can monitor your own classes, 3rd party classes, and jdk classes.