New in 1.8.0:
* diff3(1) support. No directory diff3 support yet.
* -o option to specify a merge output file.
* Improved keyboard navigation (PageUp and PageDown).
* Bug fixes.
* ~/.gnome/gtkdiff file has been changed.
The previous version might crash with a new file.
This version works with a previous file.
New in 1.7.0:
* Highlight selected region.
* Search feature in directory view.
* Directory view's functions are improved.
* Merge UI is improved a little. Click to select, one more click to insert.
* diff(1) -s option support.
* check sum support. (using cksum(1) or sum(1))
* Bug fixes.
