tiscreen (TI calculator screen)

This package mimics the screen and buttons of older Texas instruments dot
matrix display calculators, specifically the TI-82 STATS.

Changes:
- 2021/12/31 Added all buttons
- 2021/12/18 Add TI-84 characters
- 2021/09/18 Added buttons
- 2021/07/22 Added bracket symbols
- 2021/06/10 Simplified example code in documentation
- 2021/06/07 Simplified characters table in documentation
- 2021/06/01 Added more characters
- 2021/05/21 Minor README and documentation issues
- 2021/05/17 Initial version

For more information, please see the documentation.

Copyright (C) 2021 Mustafa Ibrahim
This work may be distributed and/or modified under the conditions of the LaTeX
Project Public License, either version 1.3c or higher. The latest version the
license is at: https://www.latex-project.org/lppl.txt