Removed now unnecesary workaround for PyPy

Change-Id: I7bf6346edc399ec29b125b50eb7ac2cfbb87cdfa
Add CONTRIBUTING.md

There is no CONTRIBUTING.md file, the patch will add it.

Change-Id: Idc0a9ae22f2b315375b660263c7602e3ca02d56b
Merge "Removed now unnecesary workaround for PyPy"