Created lib directory and moved tkdnd to lib/tkdnd
FIX: Do not depend on md5 to calculate thumbnail location

This thumbnail behaviour needs to be fixed for windows
FIX #34 : Added watermark wrap mode for easy image array creations
FIX: regression. No widget for preview size
Enhance presets.config parsing
FIX Missing Keep format option

This is the last v1 missing from v2.
FIX #46 : Added new icon set