Added readme

Author: y-lohse

README.md

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+# **Frost**
+
+Frost is an app for [Cozy Cloud](http://cozy.io) that lets you take snapshots of webpages so you can keep them around forever.
+
+*Introduction en français [ici](https://forum.cozy.io/t/frost-application/2123)*
+
+![Frost screenshot](https://forum.cozy.io/uploads/default/original/1X/94599e30da39e09b29456ae3ca8527de90ee0a83.png)
+
+Link rot is a huge problem on the web, and it's especially painful when one of your favorite pages just vanishes. Services like the [Wayback Machine](https://archive.org/web/) or [Pinboard](https://pinboard.in/) are great, but they rely on someone having money to maintain the service and in the end, you still don't own your data. A personnal cloud is therefor the ideal place to store snapshots of sites you care about, and this is what Frost does.
+
+**Frost is currently in alpha. Things work mostly fine and you're welcome to try it, but please hold on a bit more before starting serious usage.**
+
+## What is Cozy?
+
+![Cozy Logo](https://raw.github.com/mycozycloud/cozy-setup/gh-pages/assets/images/happycloud.png)
+
+[Cozy](http://cozy.io) is a platform that brings all your web services in the
+same private space.  With it, your web apps and your devices can share data
+easily, providing you
+with a new experience. You can install Cozy on your own hardware where no one
+profiles you.
+
+## Community
+
+You can reach the Cozy Community by:
+
+* Chatting with us on IRC #cozycloud on irc.freenode.net
+* Posting on our [Forum](https://forum.cozy.io/)
+* Posting issues on the [Github repos](https://github.com/cozy/)
+* Mentioning us on [Twitter](http://twitter.com/mycozycloud)
+
+# Contributing
+
+This is a side project and while there are ton of possible features, I'm not sure I'll ever get around creating them all. But outside contributions are very welcome.
+
+I'll update this guide later, but basically:
+
+- The server is a node app. Run `node server` to start it. You need the cozy dev stack installed on your machine.
+- The client part is written wth [Aurelia](http://aurelia.io/), because I wanted to try it. The sources are for the js are in the `src` folder. You'll need to run `gulp watch` or `gulp bundle` in the root folder to run the file processing. The main html and css files are in the `client` dir. You also need jspm installed. Like I said, I'll write a proper guide at some point.