#6 Add a stdout option

[Paul Chitescu]

The new -o option added by this patch allows asfrecorder to write
the output data to stdout so it can be piped in other programs. In
that case the normal messages are written to stderr. Errors are
now always directed to stderr (makes sense, eh?)

Note: the patch should be applied after asfrecorder-exitcode.patch
else patch will issue warnings due to line offsets.

[Paul Chitescu]

Patch to add a stdout option to asfrecorder