Updated outdated parts of the CONTRIBUTING guide
Updated outdated parts of the CONTRIBUTING guide

YorickPeterse/oga,ttasanen/oga,YorickPeterse/oga,YorickPeterse/oga,YorickPeterse/oga,ttasanen/oga,ttasanen/oga,ttasanen/oga,YorickPeterse/oga,ttasanen/oga