update readme with setup info

README.md

@@ -1,2 +1,25 @@
 # WirelessAuthScript
 Work or school wifi require login through a web page. This script handles all that for you.
+
+##Setup
+The script is simple, the hard bit finding the login format. Using your browsers dev mode examin the login form or capture the network traffic to figure that out.
+
+###Config
+
+**Router**
+The IP address of the Gateway. THis is used to only send login info to proper router
+
+**USER**
+**PASS**
+Your login username and password
+
+**POSTDATA**
+As each wifi network will be differnt this will need to be changed to match the post data sent.
+
+*POSTURL**
+URL to send login information too.
+
+###Installation
+
+make the script executable and place into
+`/etc/network/if-up.d/`