update readme (#4)

* add a usage note

* update note

* typo

* add github release version badge

Author: patrickdevivo

README.md

@@ -1,6 +1,7 @@
 [![GoDoc](https://godoc.org/github.com/augmentable-dev/tickgit?status.svg)](https://godoc.org/github.com/augmentable-dev/tickgit)
 [![BuildStatus](https://github.com/augmentable-dev/tickgit/workflows/tests/badge.svg)](https://github.com/augmentable-dev/tickgit/actions?workflow=tests)
 [![Go Report Card](https://goreportcard.com/badge/github.com/augmentable-dev/tickgit)](https://goreportcard.com/report/github.com/augmentable-dev/tickgit)
+![GitHub release (latest SemVer)](https://img.shields.io/github/v/release/augmentable-dev/tickgit)
 
 ## tickgit 🎟️
 
@@ -54,3 +55,8 @@ To be honest, I'm not sure yet. This project is a POC I'm exploring. Keeping tic
 brew tap augmentable-dev/tickgit
 brew install tickgit
 ```
+
+
+### Usage
+
+The most up to date usage will be the output of `tickgit --help`. The most common usage, however, is `tickgit status` which will print a status report of tickets for a given git repository. By default, it uses the current working directory.