Support for 'events' and 'service checks' (DataDog statsd extension)

[visciang]

Do you think we can extend the library to include events and service-checks reporting?

https://docs.datadoghq.com/guides/dogstatsd/#events https://docs.datadoghq.com/guides/dogstatsd/#service-checks

If you think we can go in that direction I will open a PR.

[asummers]

https://github.com/CargoSense/ex_statsd/pull/21/files

This added the functionality for a different lib, so it can probably be referenced. I support this feature's existence =)