This plugin will create simple upvote and downvote system for WordPress posts.

Installation:

1. download the plugin in release page
2. upload to WordPress site
3. activate the plugin
4. edit single post template page
5. add button to wherever you want, give class name "ys-upvote-button", so later plugin can detect it as upvote button
6. additionally, you can also add downvote button, add new button, and give class name "ys-downvote-button"
7. it will show number of upvote and downvote in post list pages in WordPress admin