add pre-commit and clang-format config #84
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This PR fixes the inconsistent code formatting used throughout the source to conform to the ROS C++ standard using
clang-format
and @davetcoleman's.clang-format
config: https://github.com/davetcoleman/roscpp_code_format/blob/master/.clang-formatMoreover, this patch also adds a
pre-commit
config to automate code-formatting.Why? This change makes future PRs and code-review easier, by comparing the actual code diffs rather than formatting changes.