0.3-6
fix a bug which blocks startup Rz
add theme folder selecter
handling exception that specified theme doesn't exist
improve row header of Data View
fix preferences dialog's position

0.3-3 2012-01-31
fix issues around licenses

0.3-1 (internal version)
add data view
add "add layer" button
add geom and stat
change stratum options' layout
minor layout adjustment
clarify license of themes and images

0.3-0 (internal version)
add Plot View
add preferences
add revert to original dataset
add reload from global environment
extend import and save file format
many bugs fixed

0.2-1 2011-04-04
initial release
