+1.9.9 - 6/29/00
+ Fixed const issue with ImageFileArray
+ Fixed Array2dFile::labelsCopy()
+ Added copy constructor and assignment for Array2dFileLabel class
+ Added Timer to if-2.cpp and ifinfo.cpp
+
+1.9.8 - 6/27/2000
+ Rewrote Array2dFile class to be non-templated
+ Rewrote Array2dFile class to make reads and writes atomic. No disk files are kept open.
+ Rewrote Array2dFileLabel class to make members private, added access routines
+ Removed timedate.cpp in favor of standard C library time/date functions
+ Renamed ctrec to pjrec, sample-ctrec.sh to sample-ctsim
+ Added signature tag and creation date/time to projection files
+
1.9.7 - 6/25/2000
Standardized string option processing by classes. All classes use character strings
to select options rather than numeric constants. Added fail() and failMessage()