Recognise Satoru Kurashiki

Who has maintained the GoldenCheetah Linux package since v2.1.
Now added to the contributors in the About dialog and also
recognised in the release notes for v3.0
Fix RawRidFile fdopen assert crash

Rather than assert it might be better to handle fdopen()
calls that fail with more grace.  Especially since the
file wasn't being closed.

Ugh.