Zperfmetrics

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- Fix: virtual path config in ZMetric class.
[syzn]

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- Feature: New value publish.commit.
Delta time used from publish.beforecommit to request end.
[jensens]

- Fix: publish.sum shows now overall time of request processing.
[jensens]

- Fix: Update README to reflect last changes.
[jensens]

- Use more beautiful paths if VirtualHostMonster is used.
[syzn]

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- Fix: Before/after hooks were not assigned correctly.
[jensens]

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- Fixes measurements of zope request, also add more detailed metrics.
[jensens]

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- Measure time a zope request needs.
[jensens]

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- Refactored: ZConfig best practice
[jensens]

- Fix: Strip trailing dot from prefix
[jensens]