Implement DICOM, HTTP, and SMB object exports. Rename the GTK+ export
files. C++-ize epan/tap.h. Fix an apparent memory leak in
eo_save_all_clicked_cb.
The Qt dialog has an indeterminate progress bar. I tried adding
something similar to the GTK+ dialog but event processing led down a
rabbit hole.
svn path=/trunk/; revision=45647