Code submissions have continually suffered from formatting
inconsistencies that constantly have to be addressed. Using
clang-format simplifies this by making code formatting more consistent,
and allows automation of the code formatting so that maintainers can
focus more on the code itself instead of code formatting.
Currently the captioning code is a bit intertwined with the UI, and the
captioning is hard-coded towards microsoft speech API.
This patch abstracts captions to allow other APIs to be implemented
later.
