Demo graph paper 2021 editor engine prototype

This https://youtu.be/yOCcjHMsWD4 is a demo video that is a tentative new graph paper 2021 editor engine.
A command line tool, ssf2svg for Small Sketch Data Conversion
I have made a new command line tool ssf2svg for SmallSketch native data format SSF converter. You can convert SSF into SVG.

MindBoard 2019 version 1.6.6 Settings Improvements
I have been added some setting options:
- Pen Thickness
 - Background Color
 - Save as Default
 

Small Sketch version 1.8.0 Release: Backup and Restore

Add support for backup and restore.
Please use this feature in the case of geting a new android device.
Small Sketch version 1.7.8 Release

File manager UI improvements: making each pageItemView widened.