Merge branch 'feature/language' into 'develop'

CMakeLists.txt

packages/PEGTL/.appveyor.yml

packages/PEGTL/.clang-format

packages/PEGTL/.conan/build.py

packages/PEGTL/.conan/test_package/CMakeLists.txt

packages/PEGTL/.conan/test_package/conanfile.py

packages/PEGTL/.conan/test_package/test_package.cpp

packages/PEGTL/.doozer.json

packages/PEGTL/.gitignore

packages/PEGTL/.gitrepo

packages/PEGTL/.travis.yml

packages/PEGTL/CMakeLists.txt

packages/PEGTL/LICENSE

packages/PEGTL/Makefile

packages/PEGTL/README.md

packages/PEGTL/conanfile.py

packages/PEGTL/doc/Actions-and-States.md

packages/PEGTL/doc/Changelog.md

packages/PEGTL/doc/Contrib-and-Examples.md

packages/PEGTL/doc/Control-and-Debug.md