Fix syntax highlighting in ::new()

See merge request !111

.gitignore: Add Emacs backfile

See merge request !109

Update platforms.md

See merge request !106

Emacs creates *~ as a backup file.  Ignore them.
Signed-off-by: Yasushi SHOJI <yashi@spacecubics.com>

Since AppVeyor build failures will fail the GitLab builds, this badge is redundant
and can make things look worse than they are, so just remove it entirely.

Dcb init fix

See merge request !100

Filed retep998/winapi-rs#973 in the hope that this ergonomic papercut might improve in the future

Mimic DCB init of dotnet system.io.ports

Closes #92

See merge request !97

This was an experiment in other markup languages. Markdown has won,
however, and keeping this single document now that most other
documentation is in markdown just doesn't make sense.

Also found that the original Keep A Changelog template had links to
each of the release versions in the version section headers, so
added those in.

GitLab changed how they do badges and it didn't work anymore. Created the new one
and the naming changed so updating it here in the docs

Don't open POSIX ports in exclusive mode

Closes #65

See merge request !98

Marking ports as exclusive breaks usage on WSL/WSL2 and isn't strictly
necessary to open a port. Since TTYPort::set_exclusive() exists, and
can be done after opening the port, instead default to non-exclusive
access.

[POSIX] Get rid of heap allocation in wait_fd

See merge request !92

Add `set_break` and `clear_break` for SerialPort

Closes #62

See merge request !70

Windows and POSIX systems expose a similar API for setting and
clearing a break condition. This exposes it through the cross-
platform SerialPort trait.

Fix test failures on Mac

See merge request !95

Migrate Mac OS builds to AppVeyor

See merge request !96

This removes the need for cloning my repos to GitHub to use Travis CI.