Log Message:
Update transifex-client to 0.10.  This is a leaf package and a warning mail
would be sent from Transifex when using old transifex-client.

Here is some of changes from commit log.

* Use urllib3 for the API call; it allows to have proper SSL certificate
  verification (see CVE-2013-2073) as well as drop a lot of code.
* Add --psuedo option.