Simple Unix Reference

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2.2
- Added capability to choose from many fonts
- Added capability to set font size

2.1
- Added content to perl section
- Some content rephrased for clarity
- Cosmetic UI updates

2.0
- New improved UI
- Added multiple subjects (sed/awk/perl/vi)

1.4
- Added more commands
- Added ability to expand/collapse categories by tapping on section header
- Added menu

1.3
- Added few more commands
- Used clear background for better visibility
- Allow move to SD card (to save space)