Yacron

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* Sentry: increase the size of messages before getting truncated 54
* Sentry: allow specifying the environment option 53
* Minor fixes

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* unicode fixes for the exe binary version

* Add ability for one config file to include another one 38
* Add shell command reporting ability (Hannes Hergeth, 50)

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* constrain ruamel.yaml to version 0.17.4 or below, later versions are buggy

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* blacklist ruamel.yaml version 0.17.5 in requirements 47

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* web: don't crash when receiving a web request without Accept header (45)
* add env_file configuration option (Alessandro Romani, 43)
* email: add missing Date header (39)