+1.9.1 - 6/20/2000
+ Converted all file i/o to C++ library
+
+1.9.0 - 6/15/2000
+ Skip versions to make version 2.0 the first C++ version
+ Renamed Raysums to Projections throughout files
+ Renamed Detector to Scanner
+ Converted Scanner and Projecions to full object-oriented
+
+0.6.1 - 6/12/2000
+ Converted Phantom and PhantomElements to Object-Oriented
+ Converted Detector to Object-Oriented
+