Exception documentation

[Alex Pavloff]

I'm trying to use ost::MappedFile, and I'm doing something wrong, so its
throwing exceptions.  The problem is that

1) The possible exceptions thrown by each functoin are not documented.
2) The exceptions themselves (ost::Exception,FileException, IOException...)
aren't in the documentation at all.  

This makes things harder than they have to be.

Alex Pavloff - address@hidden
Eason Technology -- www.eason.com