Issue #10: Added initial examples

examples/README.md

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+# Code examples
+
+* [Static file server](fileserver)

examples/fileserver/Makefile

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+fileserver: clean
+	go build -o fileserver
+
+clean:
+	rm -f fileserver

examples/fileserver/README.md

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+# Static file server example
+
+Serves files from the given directory.
+
+# How to build
+
+```
+make
+```
+
+# How to run
+
+```
+./fileserver -addr=tcp.addr.to.listen:to -dir=/path/to/directory/to/serve
+```

examples/fileserver/fileserver.go

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+// Example static file server. Serves static files from the given directory.
+package main
+
+import (
+	"flag"
+	"log"
+
+	"github.com/valyala/fasthttp"
+)
+
+var (
+	addr = flag.String("addr", ":8080", "TCP address to listen to")
+	dir  = flag.String("dir", "/usr/share/nginx/html", "Directory to serve static files from")
+)
+
+func main() {
+	flag.Parse()
+
+	h := fasthttp.FSHandler(*dir, 0)
+	if err := fasthttp.ListenAndServe(*addr, h); err != nil {
+		log.Fatalf("error in ListenAndServe: %s", err)
+	}
+}