Version 1.2

Fixes

1. In 1D mode errors were not reported when the amount of sprite graphics exported was too large with given settings.
2. Warning if an animated image's frames are all not the same dimensions
3. Fix -resize paramter not allowing empty resizes
4. Fix for multiple palette exports using -transparent
5. In gui version add prompt for overwriting files
6. Better logging in some areas.

New stuff

1. New mode -palette which allows you to export just a palette
2. For mode 4, tiles, and sprites you can now export against a custom palette.