Pywlroots

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* Merged pull request `81 <https://github.com/flacjacket/pywlroots/pull/81>`_:
Catch OSErrors triggered by ffi_build.py version check
implemented by `Matt Colligan <https://github.com/m-col>`_

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* Merged pull request `79 <https://github.com/flacjacket/pywlroots/pull/79>`_:
Don't wrap IdleInhibitorV1's destroy event data
implemented by `Matt Colligan <https://github.com/m-col>`_

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* Get build-time information from local files

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* Skip version check in ffi_build if unable to create file (which is a sign of
using a system installed version of the library)

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* Added support for idle_inhibitor

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* Added idle protocol