+ * ctsim: Added graphical About box
+
+ * ctsim: Escape key now removes cursor lines from image file view
+
+ * ctsim: Added Revert to ImageFile menu
+
+ * ctsim: Added accelerator (hotkeys) to frames
+
+ * ctsim: Online help added!
+
+ * backprojector: Added cubic interpolation
+
+ * ctsim: Added icons to Frames on X-Window and MS Windows versions
+
+ * ctsim: Fixed tick-label placement for plots on projection and
+ reconstruction dialogs.
+
+ * timer.h: Add use of _ftime when compiling on MSVC
+
+ * global: Projection files are not compatible with previous version
+ due to new scanner definitions.
+
+ * global: deleted concept of field-of-view and added
+ view ratio and scan ratio concepts.
+
+ * ctsim: Fixed crash on shutdown bug