gitweb: shortlog template: removed excessive whitespace, added title bar.
The title bar is currently empty, this is just a preparation for filling it
with content.
adding dir/bar
adding foo
dir/bar
foo
adding dir/bar_2
adding foo_2
dir/bar_2
foo_2
adding a
adding c
adding b
adding d
removing a
removing c
recording removal of a as rename to b (100% similar)