+0.5.2-b6 - 5/6/2000
+ Added Microsoft VC compatibility
+
+0.5.2-b5 - 5/7/2000
+ Continued conversion to ANSI C
+ Removed old CRT routines
+
+0.5.2-b4 - 5/4/2000
+ Renamed pictures to phantoms, objects to phantom elements
+ Continued code cleanup
+
+0.5.2-b3 - 4/30/200
+ More code cleanup with reorganizing libraries
+ Added --log and --exp to sdf-1
+ Allowed negative numbers for window levels in CGI interface
+
+0.5.2-b2 - 4/30/200
+ Continued code cleanup
+
+0.5.2-b1 - 4/29/2000
+ Fixed a few MPI bugs
+ Better documented, coded raysum in-memory on on-disk options
+
0.5.1 - 4/28/2000
Cleaned out library that wasn't being used by CTSim
Modified ctsim.cgi to read in configuration file ctsim.conf