Bugfixes
- use setPixel instead of drawPixel
- improve performance of LogicalSolver
- treat colors with transparency as blank cells
- add colorMapping
- fix line solver
- support colored nonograms
- add GridGenerator
- make Description json serializable
- add more factory functions
- add Grid.getHash()
- add Solution.sweeps()
BREAKING CHANGES:
- removed Generator
- rename NgColors to Colors
- Initial version.