A few fixes (Koppi). See https://groups.google.com/a/webmproject.org/group/codec-devel/msg/3632b982d5e03b3d?hl=en

Change-Id: Ia257d07ae00555a129a5d3e8d81309707a569f23
modified:   webm-contributor-guide.html
modified:   webm-contributor-guide.txt
2 files changed