[Bf-python] Clearing single scriptlink

[Ken Hughes]

Stephen Swaney wrote:
> I like exceptions (well, not *getting* them!) for too many
> reasons to go into at this late hour.  I would like to
> see this become the preferred method for reporting errors
> in bpy rather than clunky return codes.

OK, uploaded the patch and a test script.  I implemented
exception handling in clearScriptLinks() and addScriptLink();
I assume doing this won't break many things (which aren't
already broken).

Ken