Pontoon: Updated Turkish (tr) localization of Pontoon Intro
Pontoon: Updated Turkish (tr) localization of Pontoon Intro

Translation authors:
- Selim Şumlu <selim@sum.lu>

jotes/pontoon-intro,mathjazz/pontoon-intro,jotes/pontoon-intro,jotes/pontoon-intro,mathjazz/pontoon-intro,mathjazz/pontoon-intro