Planned functionality (in no particular order)

* Create dialog for mapping symbols to colours
* Modify import image dialog to allow cropping of the image
* Implement drag and drop
* Implement Undo / Redo
* Add tools for mirroring, rotating and scaling
* Implement insertion of rows and columns into the pattern
* Implement conversion of patterns floss scheme
* Implement adding notes to patterns
* Implement layout tools
* Improve the quality of imported patterns
* Improve the documentation
