Improve readme.md

[carl-alberto]

Add installation instructions

promote that the plugin is very lightweight

Good to be used for optimization

make comparison vs
soliloquy
revslider
layerslider
meta slider
nivoslider
smart slider
slide anything

metrics
page load time
page size
request

[carl-alberto]

Similar to
https://wp-rocket.me/blog/fastest-wordpress-image-slider-2019/
https://www.wpbeginner.com/best-wordpress-slider/

[carl-alberto]

Improve instruction usage and keywords

[carl-alberto]

Improve installation instruction

Installation
Upload the whole responsive-slider-lite directory to the /wp-content/plugins/ directory
Activate the plugin through the ‘Plugins’ menu in WordPress
Go to the Responsive slider lite and add your images as featured images, you have the option to assign a category
Use shortcode [rsliderl] in any page or post to load all images.
Optional Parameters:

Load only a particular category:
[rsliderl cat=”category_name”]

Show Image title:
[rsliderl title=”true”]

Show Image description:
[rsliderl description=”true”]

You can also use combinations like loading a category with title and no images: