update README.md

Author: Vitalick

README.md

@@ -3,7 +3,7 @@
 [![Go Report Card](https://goreportcard.com/badge/github.com/vitalick/d2s)](https://goreportcard.com/report/github.com/vitalick/d2s)
 [![GoDoc](https://godoc.org/github.com/vitalick/d2s?status.svg)](https://godoc.org/github.com/vitalick/d2s)
 
-Simple Go package for reading and writing Diablo 2 saves. Supports version 1.10 through Diablo II: Resurrected (1.15).
+Go package for reading and writing Diablo 2 saves. Supports version 1.10 through Diablo II: Resurrected (1.15).
 Supports reading both d2s (player saves) ~~and d2i (shared stash)~~ files.
 
 ## Installation

d2s-conv/README.md

@@ -0,0 +1,24 @@
+# Diablo 2 Save editor CLI
+
+CLI for convert .d2s to JSON and vice-versa
+
+## Installation
+
+To install command line program, use the following:
+
+```bash
+go install github.com/vitalick/d2s/d2s-conv@latest
+```
+
+## Usage
+### CLI
+
+For convert JSON to .d2s, use the following:
+```bash
+d2s-conv -fromjson <input files>
+```
+
+For convert .d2s to JSON, use the following:
+```bash
+d2s-conv -tojson <input files>
+```