Update README to clarify refreshTimeoutOnRequest

Hopefully this should make the documentation a little more clear in this instance and close #14

README.md

@@ -39,7 +39,7 @@ Classes
 	- `failCallback`            Gets called with (`req`, `resp`, `next`, `nextValidRequestDate`) when a request is rejected (default: ExpressBrute.FailForbidden)
 	- `proxyDepth`              Specifies how many levels of the `X-Forwarded-For` header to trust. If your web server is behind a CDN and/or load balancer you'll need to set this to however many levels of proxying it's behind to get a valid IP. Setting this too high allows attackers to get around brute force protection by spoofing the `X-Forwarded-For` header, so don't set it higher than you need to (default: 0)
 	- `attachResetToRequest`    Specify whether or not a simplified reset method should be attached at `req.brute.reset`. The simplified method takes only a callback, and resets all `ExpressBrute` middleware that was called on the current request. If multiple instances of `ExpressBrute` have middleware on the same request, only those with `attachResetToRequest` set to true will be reset (default: true)
-	- `refreshTimeoutOnRequest` Defines whether the remaining `lifetime` of a counter should be based on the time since the last request (true) of the time since the first request (false). Useful for allowing limits over fixed periods of time, for example a limited number of requests per day. (Default: true)
+	- `refreshTimeoutOnRequest` Defines whether the `lifetime` counts from the time of the last request for a given IP (true) or from of that IP's first request (false). Useful for allowing limits over fixed periods of time, for example: a limited number of requests per day. (Default: true). [More info](https://github.com/AdamPflug/express-brute/issues/14)
 	- `handleStoreError`        Gets called whenever an error occurs with the persistent store from which ExpressBrute cannot recover. It is passed an object containing the properties `message` (a description of the message), `parent` (the error raised by the session store), and [`key`, `ip`] or [`req`, `res`, `next`] depending on whether or the error occurs during `reset` or in the middleware itself.
 
 ### ExpressBrute.MemoryStore()