v1.4.0 to fix issue with slow browsers or network

### Releases v1.4.0

1. Fix issue with slow browsers or network
2. Remove hard-code if possible
3. Improve debug messages by adding functions to display `error/state messages` instead of `cryptic error/state number`
4. Clean up

Author: khoih-prog

README.md

@@ -33,6 +33,7 @@
   * [AsyncPrinter](#AsyncPrinter)
   * [AsyncTCPbuffer](#AsyncTCPbuffer)
   * [SyncClient](#SyncClient)
+* [Libraries currently depend on this library ](#Libraries-currently-depend-on-this-library ) 
 * [Debug Terminal Output Samples](#debug-terminal-output-samples) 
   * [1. Async_AdvancedWebServer on PORTENTA_H7_M7 using Ethernet](#1-Async_AdvancedWebServer-on-PORTENTA_H7_M7-using-Ethernet)
   * [2. Async_AdvancedWebServer on PORTENTA_H7_M7 using WiFi](#2-Async_AdvancedWebServer-on-PORTENTA_H7_M7-using-WiFi)