Updated readme

Author: overheadhunter

README.md

@@ -1,7 +1,25 @@
+[![Build Status](https://travis-ci.org/cryptomator/cli.svg?branch=develop)](https://travis-ci.org/cryptomator/cli)
+
 # Cryptomator CLI version
 
 This is a minimal command line program which unlocks vaults, which can then be accessed via an embedded WebDAV server.
 
+## Disclaimer
+
+This project is in an early stage and not ready for production use. We recommend to use it only for testing and evaluation purposes.
+
+## Download and Usage
+
+Download the jar file via [GitHub Releases](https://github.com/cryptomator/cli/releases)
+
+Cryptomator CLI depends on a Java 8 JRE. In addition the JCE unlimited strength policy files (needed for 256-bit keys) must be installed.
+
+```sh
+java -jar cryptomator-cli-x.y.z.jar --port 8080 --vault demoVault=/path/to/vault --password demoVault=topSecret
+# you can now mount http://localhost:8080/demoVault/
+```
+
+In the current test version passwords can only be provided as a program argument. This will change in the future.
 
 ## License