Write up a quick readme

README.md

@@ -1,2 +1,16 @@
-# re621
- RE:621 - e621 Reimagined
+RE:621
+================
+
+## e621, Reimagined
+
+RE621 is a comprehensive project created to improve the basic user experience while browsing e621.net. It consists of several different modules that enhance the entire site, top to bottom - literally.
+
+## Installation
+
+The project is delivered via a userscript. This means that you need a script manager, such as [Tampermonkey](https://www.tampermonkey.net/).
+
+With a script manager installed, click on [this link](https://github.com/re621/re621/releases/latest) and follow the instructions on the new page.
+
+## Contributing
+
+Contributions are always welcome. For bug reports, suggestions, and feature requests, head on over to the [issue tracker](https://github.com/re621/re621/issues).