Add examples to readme

README.md

@@ -1 +1,32 @@
-# Go tool belt
+# Gobelt
+
+Gobelt is a collection of Go tools.
+
+### Thread pool
+
+```go
+import "github.com/localhots/gobelt/threadpool"
+```
+
+```go
+ctx := context.Background()
+pool := threadpool.New(5)
+pool.Enqueue(ctx, func() {
+    fmt.Println("Hello")
+})
+pool.Close()
+```
+
+### File cache
+
+```go
+import "github.com/localhots/gobelt/filecache"
+```
+
+```go
+var val int
+filecache.Load(&val, "path/to/cachefile", func() interface{} {
+    // Expensive calls here
+    return 100
+})
+```

filecache/filecache_test.go

@@ -19,7 +19,6 @@ func TestFileCache(t *testing.T) {
 		if err != nil {
 			t.Fatalf("Error occurred while loading cache: %v", err)
 		}
-
 		if res != exp {
 			t.Errorf("Expected %d, got %d", exp, res)
 		}