Export Signals, so closure-shared resources can be cleaned up on quit

doc.go

@@ -42,16 +42,25 @@
 //	}
 //
 // To create workers that share a database pool or other
-// resources, use a closure to share variables.
+// resources, use a closure to share variables. Clean up
+// shared resources using the channel provided by the
+// Signals function.
 //
 //	package main
 //
 //	import (
 //		"github.com/benmanns/goworker"
 //	)
 //
-//	func newMyFunc(uri string) {
+//	func newMyFunc(uri string) func(string, args ...interface{}) error {
 //		foo := NewFoo(uri)
+//
+//		quit := goworker.Signals()
+//		go func() {
+//			<-quit
+//			foo.CleanUp()
+//		}()
+//
 //		return func(queue string, args ...interface{}) error {
 //			foo.Bar(args)
 //			return nil

goworker.go

@@ -26,7 +26,7 @@ func Work() error {
 		return err
 	}
 
-	quit := signals()
+	quit := Signals()
 
 	pool := newRedisPool(uri, connections, connections, time.Minute)
 	defer pool.Close()

signals.go

@@ -44,7 +44,7 @@ import (
 	"syscall"
 )
 
-func signals() <-chan bool {
+func Signals() <-chan bool {
 	quit := make(chan bool)
 
 	go func() {