Version bump and Usage added to README.md

Cargo.lock

@@ -207,7 +207,7 @@ dependencies = [
 
 [[package]]
 name = "rhd"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "clap",
  "hex",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rhd"
-version = "0.1.0"
+version = "0.2.0"
 authors = ["JayPiKay <jpk@goatpr0n.de>"]
 edition = "2018"
 

README.md

@@ -2,3 +2,20 @@
 [![Build Status](https://drone.goatpr0n.farm/api/badges/jpk/rhd/status.svg)](https://drone.goatpr0n.farm/jpk/rhd)
 
 Rust learning project.
+
+## Usage
+
+```shell
+A simple hexdump tool
+
+Usage: rhd [OPTIONS] [FILENAME]
+
+Arguments:
+  [FILENAME]  Filename to read, if left out read from stdin
+
+Options:
+  -l, --length <LENGTH>  Stop after <len> octets
+  -r, --revert           Revert hexdump to binary
+  -h, --help             Print help information
+  -V, --version          Print version information
+```