Changes

This is a preview release containing two changes we are considering:

• #335: Using raw performance counters rather than WMI, which will both yield significantly faster scrapes, as well as avoiding some bugs in Windows related to WMI hanging periodically (eg #89)
• #340: Aborting a scrape if there are stalls during the scrape, to ensure Prometheus gets a response even during high loads (#270)

Any feedback on these changes is very welcome as comments on the two above PRs!

About the version number

The Windows Installer framework requires a three-position version, and does not allow semver prerelease tags (-preview, in this case). It is also somewhat picky about which versions can be upgraded between. In order to both allow us to make patch releases on the 0.7 version, as well as support upgrading from this preview to a coming 0.8 release, patch number 999 was arbitrarily chosen.