Added locale option to export data from language subdirs

[eps1lon]

Adds support to export *.dat files in Data from subdirectories which represent different languages.

Currently language symbols are dumped as unicode symbols. Adding enfore_asci=False to json.dump would convert those to utf8 symbols but I'm not sure if this would break backwards compatibility.

I'm not sure if other distributors contain other languages and if those should be included. Currently the default is not english but rather the base directory. In other distribution this might be e.g. Chinese.

[coveralls]

Coverage decreased (-0.06%) to 40.63% when pulling e57c719 on eps1lon:add-locale-option into 3a6a962 on OmegaK2:dev.

[OmegaK2]

I like the idea in general, but I don't think it's necessary to request the locale id which then isn't used. Could just use the full name instead. I just don't have a means to check if that approach works on the Chinese client though

[eps1lon]

From a dev standpoint I agree with you. I just thought that using only a locale code was better from a usability standpoint (typing pt is simpler than Portuguese but since this is basically a dev only tool I'm fine with providing the actual subdirectory. Your implementation also doesn't need to be maintained if more languages get added (which should be the case once 3.0.2 hits) which is always nice.

Thanks for implementing this and improving this!

[Chuanhsing]

'cn' => 'Simplified Chinese',
'tw' => 'Traditional Chinese',
and there should also have Spanish, French and German