* Fixed an issue when configuration file options partly ignored when using custom ``--project-conf`` // Resolve#3034
* Py2 compatible makedirs
* Fix circle dependency
* Fix broken import in test examples
* Fix history
* Remove YAPF markers
* PyLint fix
* Fix invalid project conf path
* Move PIO Core to the root on Windows, issue with long CPPPATHs
* Respect global PLATFORMIO_BUILD_CACHE_DIR env var
* Fix Appveyor paths
* Minor changes
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