Allow setting CLD2_PATH in environment

[pquentin]

CLD2 and python-cld2 are currently difficult to deploy. Eventually CLD2 should install to standard locations and python-cld2 should find the files it needs in those locations, but for now, how about not requiring to edit setup.py? This would make my life a bit easier. :)

Thanks for python-cld2!

[pquentin]

I'm not sure who should review this. It looks like @mikemccand wrote the code (this is what the README says), but @vshlapakov appears in the commits. Is this the correct repository to send a pull request to?

[vshlapakov]

Just have seen this PR, my apologies @pquentin. The library itself belongs to Michael, so I'm redirecting all thanks to him :) When I was working on it, there was only abandoned code (it seemed so for me) on code.google.com, and I had to improve it a bit for our internal use (and for our build system), so I wasn't sure about use of this repo for others and just cloned the project (with all needed links and original readme). Now as I see that they ported the code to github, so probably it's a good idea to prepare PR using these changes. Thanks for pointing me, I'll merge this PR but it'd be much better to contribute to the original source repo in future.

[pquentin]

Thank you @vshlapakov! Just to be sure, are you referring to https://github.com/mikemccand/chromium-compact-language-detector?

[vshlapakov]

Yw! @pquentin Yeap, that repo!