+TODO
+ Read PlotFile's.
+ Add to ctsim export of imagefiles to standard graphic formats.
+ Use FFTW library in imagefile.cpp
+
+3.0alpha1 - Released 12/29/00
+
+ * Added PlotFile class to system, used by if2 and ctsim for row
+ and column plots and comparison plots
+
+ * ctsim: Added image comparison statistics and image subtraction
+
+ * ctsim: Added plotting of rows & columns with y-axis scaling
+
+ * ctsim: Added row and column plot comparisons between two image
+ files.
+
+ * ctsim: Added "Process" menu to image file display with math
+ functions. Added 2-dimensional inverse Fourier to math
+ functions. Added support for complex (real/imaginary) images.
+
+ * mathfuncs.cpp: Reworked statistics algorithm to share between
+ imagefile and plotfile classes.
+
+ * imagefile.cpp: Fixed scaling bug when rasterizing Phantom with
+ nsamples > 2. Added generic mage math functions, moved from
+ if1.cpp and if2.cpp to imagefile.cpp. Added support complex
+ images.
+
+ * array2dfile.cpp: Added code to support complex (real/imaginary)
+ images.
+
+ * if1: Updated to handle error conditions, such as sqrt of a
+ negative number. Converted to use new ImageFile math functions.
+
+ * if2: Updated to output plot files and use new ImageFile class
+ math functions
+
+ * if1: Updated to use new ImageFile class math functions
+
+ * ezplot: Reworked to better store colors/linestyles/symbols with
+ individual curves. Improved display of labels and ticks. Updated
+ to use POL class member variable. Updated to more C++ conventions.
+
+ * pol: converted to C++ class. Extracted HashTable to separate
+ class.
+
+ * sgp: Added linestyle settings
+