Insert header line in group summary view

Insert header line in group summary view

Now you can specify a group with a name of "break";. When this group
shows up depending on the group view you're using it does several things.

In the HTML mode, it displays the header bar again. This allows you to
cleanly breakup some different groups in either the brief or standard
group summary views. This group is skipped in the full view.

In text mode it does a simialr thing, but just prints a blank line instead
of repeating the header lines.

An example of what to put in your spong.groups file is:

'group 1' =>; { ... },

'----' => { name => 'break' },

'completely different group' => { ... }