Add property details repository

 Before this PR gets merged, we need to reset @kl-kevin's accidental [commit 7a6b44e](https://github.com/seattleu/MobileAPI/commit/7a6b44e94f310c22be766347fd1521b0142af04f) from master. I did this yesterday, but it's back again. I'm guessing GitHub for Windows is doing something funny with the sync button and re-pushing the commit each time.

@biancaflaidar & I will work on the data model and mapping the response over the next 2 weeks.