* Add 'pretty' target to reformat sources to be compliant with code style.
* Add 'pretty-check' target to check if sources are compliant with code style.
* Update travis-ci script to use 'pretty-check' and enforce code style.
* The 'pretty' and 'pretty-check' targets rely on the 'astyle' tool.
* travis: Do a `make distcheck` instead of just `make check`
Doing a `make distcheck` instead of just a `make check` ensures that
the build system is sane and that the results from `make dist` have
everything needed.
* build-system: Fixes for `make distcheck`
This commit fixes the `distcheck` target by addressing the following
issues:
* Repaired ability to perform builds when the build directory is not
the source directory.
* Addressed an issue with the tarball name that occurs the very
first time `make` is run.
* posix: logging: Use `stderr` instead of `stdout` for debug logging.
* posix: serial: Restore socket `termios` settings for `stdin` and `stdout` at exit.
Jonathan Hui