breathe on windows fails due to missing path to doxygen

[psifertex]

Breathe/sphinx/doxygen on Windows (at least under a Jenkins build environment) fails to run because https://github.com/michaeljones/breathe/blob/master/breathe/process.py#L87 does not find doxygen in the path without an additionalshell=True option to the subprocess call. The change that worked for me was:

        self.run_process(['doxygen', cfgfile], cwd=build_dir, shell=True)

Note that shell=True is considered a potential security risk, however in this case all arguments to the command-line are from local data and so it shouldn't be a concern.

[vitaut]

Thanks for catching this. Could you submit a PR?

[psifertex]

Certainly -- just did so, sorry, I missed this reply originally.

[michaeljones]

Should be fixed in with #277