get_pid_cwd support for Mac OSX

[Heon Jeong]

in cwd.py there is no support for 'Darwin' kernel so It falls back to

    func = lambda pid: None

I tried to find a way using traditional procfs, but it seems osx doesn't support procfs...

but if we allow to use 'psutil'(which can be installed via pip), there is a way to get cwd using that.

I wrote a patch(against 0.97 - which can be conflict with development version, but patch is quite simple)

and hope it gets merged.

PS> bzr in my workplace doesn't work to fetch repository... so sad :(

[Egmont Koblinger (egmont-gmail)]

Note that porting Terminator to newer VTE (bug 1030562) would make this bug obsolete, as it no longer relies on an OS-specific way to get the working directory.

[Stephen Boddy (stephen-j-boddy)]

A little adjustment by yours truly, but it is in there.

[Stephen Boddy (stephen-j-boddy)]

As rev. 1617