+1.9.1 - 6/20/2000
+ Renamed directories, moved source files, combined source files
+ to change from 6 libraries to 3 libraries (libctsim, libctsupport,
+ and libctgraphics)
+
+1.9.0 - 6/15/2000
+ Skip versions to make version 2.0 the first fully 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
+