Different identifier for increment and timing

[xarlio]

We have some problems to visualize the metrics as increment and timing functions are called with the same identifier. Adding '.counter' and '.timer' suffixes will differentiate them

[coveralls]

Coverage increased (+0.3%) to 96.429% when pulling cadf647bf78fa586854e2ed5d8169885cbb9c921 on xarlio:patch-1 into 031723a2c0925fcde69ebf936a1752f5d1ec3461 on mac-:master.

[mac-]

Thanks for the contribution! A couple of questions:

1. What tool are you using to visualize the metrics? From my experience, Graphite and Grafana are able to differentiate these metrics without changing the metric name.
2. I don't have a problem with allowing a way to differentiate these by modifying the metric names, however, instead of hard-coding the .timer and .counter suffixes, can you make it configurable via options so that we don't force everyone into this convention?

[xarlio]

We are using Datadog, and AFAIK there is no way to differentiate the two metrics. I will make it optional. Any suggestion for the options names and its defaults?

[mac-]

you could do something as simple as a boolean like includeMetricTypeInName as an option, and if it's true, add it like you are doing now.