Added more usage detail to README

README.md

@@ -1,7 +1,11 @@
 Chainlink
 =========
 
-Chainlink is a utility that will run on a webserver to handle crypto-backed domains.  Specifically this works with [Unstoppable Domains](https://unstoppabledomains.com)
+Chainlink is a utility that will run on a webserver to handle crypt-backed
+domains Specifically this works with
+[Unstoppable Domains](https://unstoppabledomains.com)
+This utilizes public IPFS gateways to display IPFS content, or will redirect to
+whatever the URL is set to in the Unstoppable Domain management.
 
 Installation
 ============
@@ -11,11 +15,25 @@ To install this on your own server:
 1.  Clone this repository
 2.  Install the python dependancies via `pip install -r requirements.txt`
 3.  Run the server with `./chainlink.py`
-4.  You can now hit the app at [http://localhost:5000/](http://localhost:5000)
+4.  You can now hit the app at http://localhost:5000
 
 Testing on a running instance
 =============================
 
 Assuming that it is running (I could be messing with it, or it might just be
 broken), you may try this without installing by going to
-[https://chainlink.arachnitech.com/](https://chainlink.arachnitech.com/)
+https://chainlink.arachnitech.com/
+
+URL Patterns
+============
+
+The general format is http://localhost:5000/<domain>/</action>
+where <domain> is a .crypto or .zil name registered with Unstoppable Domains and
+<action> can be
+* html - uses the IPFS hash set in Unstoppable Domains management
+* redir - uses the redirect_url set in Unstoppable Domains management
+* raw - displays an HTML table view of the full JSON returned from Unstoppable
+    Domains API
+
+The default action is "html", so if you don't specify anything it will attempt
+to use that field.