Fboemer/clang tidy dev
- Remove remaining relative include paths of the form
../
- Enable sort-includes in clang-format
- Address some clang-tidy readability options (google-readability-casting, readability-simplify-boolean-expr, readability-redundant-member-init, readability-redundant-control-flow, readability-inconsistent-declaration-parameter-name, clang-tidy readability-else-after-return)