Close HTTP requests

Resolves #75

api.go

@@ -33,6 +33,8 @@ func (api CachetAPI) Ping() error {
 		return errors.New("API Responded with non-200 status code")
 	}
 
+	defer resp.Body.Close()
+
 	return nil
 }
 
@@ -49,6 +51,8 @@ func (api CachetAPI) SendMetric(id int, lag int64) {
 	if err != nil || resp.StatusCode != 200 {
 		logrus.Warnf("Could not log metric! ID: %d, err: %v", id, err)
 	}
+
+	defer resp.Body.Close()
 }
 
 // TODO: test
@@ -75,5 +79,7 @@ func (api CachetAPI) NewRequest(requestType, url string, reqBody []byte) (*http.
 	}
 	err = json.NewDecoder(res.Body).Decode(&body)
 
+	defer req.Body.Close()
+
 	return res, body, err
 }