Eventio

* Small performance improvements for reading simtel files

* Switching to classical semver, 1.x releases should always be compatible with ctapipe v0.7.0 , so pyeventio can be updated for new features (e.g. new eventio object versions or faster reading) but also still be used with ctapipe v0.7.0.

* Removed some old internal functions and renamed functions to match their cython implementation.

Add support for version 3 of

* PixelSettings (2004)
* TriggerInformatin (2009)
* TelescopeEventHeader (2011)

* Add support for the new eventio type 1216 for atmospheric profiles

* Better error message for `EventIOObject.parse` if called on container object

Merged PRs

* Merge pull request 184 from cta-observatory/improve_parse

* Provide `eventio.__version__`