Add Dutch translation from Transifex

Hi Team, 

One of our users completed the Dutch translation in Transifex and was asking how to get it into Sourcetree. Seems like they can not do it from their side so we need your help. 

For reference, here is the Community post: https://community.atlassian.com/t5/Sourcetree-questions/Sourcetree-translation-DUTCH/qaq-p/1072907?utm_source=atlcomm&utm_medium=email&utm_campaign=immediate_general_reply&utm_content=topic.

Cheers,

Ana