update readme

README.md

@@ -11,11 +11,15 @@
 Make sure to have [golang](https://golang.org/) installed, then do:
 
 ```bash
-go get -u github.com/miguelmota/cointop
+go install github.com/miguelmota/cointop
 ```
 
 ## Usage
 
+```bash
+$ cointop
+```
+
 ### Table commands
 
 List of shortcuts: