Linux node_cpu metrics now break out `guest` values into separate metrics. See Issue #737
**Breaking changes**
## v0.15.0 / 2017-10-06
This release contains major breaking changes to metric names. Many metrics have new names, labels, and label values in order to conform to current naming conventions.
* Linux node_cpu metrics now break out `guest` values into separate metrics. See Issue #737
* Many counter metrics have been renamed to include `_total`.
* Many metrics have been renamed/modified to include base units, for example `node_cpu` is now `node_cpu_seconds_total`.
In order to help with backwards compatibility, a `metric_relabel_config` is being worked on to allow for easier transition of metric names. See: https://github.com/prometheus/node_exporter/issues/830
Other breaking changes:
* The megacli collector has been removed, is now replaced by the storcli.py textfile helper.
* The textfile collector will now treat timestamps as errors.
* [CHANGE] Split out guest cpu metrics on Linux. #744
* [CHANGE] Exclude Linux proc from filesystem type regexp #774