update README to point to releases

Author: Takashiidobe

README.md

@@ -2,6 +2,12 @@
 
 A pager in rust, mainly implemented by using [minus](https://github.com/arijit79/minus/commit/f3ab74cf955bca00b1d0b0ed3ade1de0fd4390de).
 
+## Usage
+
+Head on over to the [Releases](https://github.com/Takashiidobe/rless/releases/latest) page and download `rless`. Move it somewhere on your $PATH and you're ready to go!
+
+You can open a file with `rless $FILENAME` just like normal less.
+
 ## License
 
 Licensed under either of Apache License, Version 2.0 or MIT license at your option.