Update README.md

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Mentioned .Close()

README.md

@@ -6,40 +6,51 @@
 
 ## Installation
 
-<pre><code># go get github.com/stratoberry/go-gpsd</code></pre>
+```
+# go get github.com/stratoberry/go-gpsd
+```
 
 go-gpsd has no external dependencies.
 
 ## Usage
 
 go-gpsd is a streaming client for GPSD's JSON service and as such can be used only in async manner unlike clients for other languages which support both async and sync modes.
 
-<pre><code>import ("github.com/stratoberry/go-gpsd")
+```go
+import ("github.com/stratoberry/go-gpsd")
 
 func main() {
 	gps := gpsd.Dial("localhost:2947")
 }
-</code></pre>
+```
 
 After `Dial`ing the server, you should install stream filters. Stream filters allow you to capture only certain types of GPSD reports.
 
-<pre><code>gps.AddFilter("TPV", tpvFilter)</code></pre>
+```go
+gps.AddFilter("TPV", tpvFilter)
+```
 
 Filter functions have a type of `gps.Filter` and should receive one argument of type `interface{}`.
 
-<pre><code>tpvFilter := func(r interface{}) {
+```go
+tpvFilter := func(r interface{}) {
 	report := r.(*gpsd.TPVReport)
 	fmt.Println("Location updated", report.Lat, report.Lon)
-}</code></pre>
+}
+```
 
 Due to the nature of GPSD reports your filter will manually have to cast the type of the argument it received to a proper `*gpsd.Report` struct pointer.
 
 After installing all needed filters, call the `Watch` method to start observing reports. Please note that at this time installed filters can't be removed.
 
-<pre><code>done := gps.Watch()
-&lt;-done</code></pre>
+```go
+done := gps.Watch()
+<-done
+// ...some time later...
+gps.Close()
+```
 
-`Watch()` will span a new goroutine in which all data processing will happen, `done` channel won't send anything.
+`Watch()` spans a new goroutine in which all data processing will happen, `done` doesn't send anything.
 
 ### Currently supported GPSD report types