slide deck presentation tool written in pure bash

Add features to readme

Signed-off-by: Anirudh Oppiliappan <x@icyphox.sh>

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readme.md
··· 3 3 4 4 ![scrot](https://x.icyphox.sh/NBq.png) 5 5 6 + ## Features 7 + 8 + - All slides are plain-text files. 9 + - Navigation using `j` / `k` or `n` / `p` 10 + - [WIP] Colors and bold/italic formatting using terminal escape sequences. 11 + - Pure bash.