improved readme

README.md

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-# snow2
+# Snow2
+
 Obfuscate & Encrypt Text as White-Space
 
 Demo: [https://ChaosWebs.net/snow2](https://chaoswebs.net/snow2/)
+
+![snow image](snow.jpg)
+
+# About
+
+Snow2 is a web app inspired by the [original snow program](http://darkside.com.au/snow/) to use whitespace/zero-width characters to obfuscate messages within the whitespace of other content.
+
+# License
+
+MIT license, see LICENSE file.
+
+# Warnings
+
+* No steganography is perfect, your message may be discovered especially by skilled adversaries.
+* Some text editors (like vim) show zero width characters
+* Some clients/places may strip whitespace characters
+* Use encryption if you really need to protect your messages. Use a good password but keep in mind that no encryption is perfect (Snow2 uses cryptojs AES)
+* It is best to save the site offline to avoid your messages being intercepted by possible malicious code sent from (my) web server
+* The larger your message, the more obvious it is that it is there.
+
+# Roadmap (to do)
+
+* Ability to automatically spread/retrieve message content into paragraphs of "cover" text
+
+* CLI version
+
+* Android app
+
+# Contributing
+
+Feel free to make a pull request if you feel that you have improved the software.