1.0 -- Initial Release
1.04 -- Release with VDC RC 1.04
1.06 -- Refactor to encapsulate Zelig description data structure, add VDCxtabs
1.07 -- Fix windows issues, add VDCWebSearch
1.08 -- Workarounds for Zelig 2.52,  remove zelig internal code (moved to zelig :-)
1.09 -- Workarounds for bugs in Zelig 2.53
1.10 -- typo-correction in printZeligSchemaInstance() in zlist.R
1.11 -- be more paranoid about plot methods, recodeVDCdf to recode data frames with VDC metadata
1.12 -- Rendering-related changes to VDCxtabs()
1.13 -- R 2.4-RC changes
1.14 -- code clean-up in compliance with R 2.6.0 
1.15 -- bug-fix of VDCgenAnalysis()