Anycast-healthchecker

* add some useful info in \_\_init\_\_
* servicecheck.py: less versbose warning
* servicecheck.py: check if we hare received stop signal before perform IP check
* ServiceCheck.py: check was unnecessarily executed twice
* main.py: call configuration checking
* add requirements file
* add a function to perform a sanity check on the configuration
* servicecheck: Tiny rewrite of comment
* servicecheck: Renamed previou\_state to check\_state
* Fixed argument name collision
* Fixed typo
* Made configurable the rotation policy for log files
* \_update\_bird\_prefix\_conf(): Doc string update
* Report valid values for on\_disabled setting
* Update ChangeLog

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* Tiny change on the comment we place on BIRD config file
* More docstrings and comment updates
* Tiny docstring update
* More pythonic way of loading module
* Spread logic from main.py to individual module files
* Update docstrings and add some comments
* Handle misconfiguration better
* More PEP8 friendly indentation
* Tiny refactoring
* print on stdout and on stderr loggers that we are daemonized
* added pylint filtering
* set umask to 022 to avoid write access for others on log files
* Cosmetic change: Report check duration earlier
* Updated ChangeLog
* fixed path README

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* added git push --tags step in README
* Added (finally) some text in README
* Renamed variable is\_updated -> bird\_updated
* another small doc update
* Various small docstrings updates
* Rewrote ServiceCheck class docstring and changed log severity to error
* Fixed indentation issue and rewrote message when IP-PREFIX is configured
* Catch the case where conf says check disabled but value for on\_disabled is wrong
* Changelog updated

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* Better handling of errors when we reload bird
* Fixed typos
* Changelog updated

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* Added program name in the header of bird configuration
* Detect if IP-PREFIX is assigned to loopback interface
* changelog

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* mpla