Nagiosplugin

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- Improve error reporting for missing contexts.
- Exit with code 3 if no metrics have been generated.
- Improve default Summary.verbose() to list all threshold violations.
- Move main source repository to https://bitbucket.org/gocept/nagiosplugin/
(11561).

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- API docs for the most important classes (7939).
- Added two tutorials (9425).
- Fix packaging issues.

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- Completely reworked API. The new API is not compatible with the old 0.4 API so
you must update your plugins.
- Python 3 support.
- The `Cookie` class is now basically a persistent dict and accepts key/value
pairs. Cookie are stored as JSON files by default so they can be inspected by
the system administrator (9400).
- New `LogTail` class which provides convenient access to constantly growing log
files which are eventually rotated.

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- Windows port. `nagiosplugin` code now runs under pywin32 (10899).
- Include examples in egg release (9901).

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Bugfix release to fix issues reported by users.

- Improve Mac OS X compatibility (8755).
- Include examples in distribution (8555).

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- Change __str__ representation of large numbers to avoid scientific notation.