transifex client config ready for transifex translations

I submitted OsmAnd to Transifex, aiming to make the internazionalization labor easier and more pleasant (https://www.transifex.com/projects/p/osmand/).

Transifex has also a command line client for making it easier to pull and push translations. With this config file, anyone with transifex-client installed is ready to run.

Hope you like it! In a few days we will also submit basque translations ;-)