This patch makes inheritance for OSA classes work. The implementation is a
bit convoluted, but I don't immedeately see a simpler way of doing it.
I added calls to ascii() everywhere we output strings that may contain
non-ascii characters (Python has gotten very picky since the encoding
patch:-).
I also removed Donovan's different way of opening resource files: I don't
seem to need it.
routine start() calling it.
Some suites declare an event start(), which obscures this method, which
causes the class initializer to fail when called with start=1.
Based on bug report and fix suggestion by Jacob Kaplan-Moss.
Jack Jansen