update README.md, uArm Library support Arduino Library Manager installation

Author: altjz

README.md

@@ -10,15 +10,30 @@ Specification Please read Documentation Center /API
 [Developer Center][3]  
 
 ## Installation
-- Download [Arduino IDE][622f1188]
-- Clone the source code into your computer.
-- Open Arduino IDE, import the zip as library. Please refer this [Import Library][8cd4af00]
-- Upload the example to your uArm, Please refer this [Upload Guide][8f51bc38]
-- You need to recalibrate When you are new to this library. We recommend the GUI Calibration tool.
 
-  [8cd4af00]: https://www.arduino.cc/en/Guide/Libraries "Import Library"
+### Library Manager *Recommend*
+
+- Download [Arduino IDE][622f1188]  
+- Import the uArm Library (search uArmLibrary) using Library Manager.
+ If you don't know how to use Library Manager. Please Refer this [Import Library Using Library Manager][4b323740]
+- Upload the example to your uArm
+ If you don't know how to upload Arduino sketch,  We recommend you read this [Arduino Getting Started on Windows][397d20eb] or [Arduino Getting Started on MacOS][2d8a8b7a]
+- You need to recalibrate when you are new to this library. we recommend the GUI Calibration tool.   
+
+  [2d8a8b7a]: https://www.arduino.cc/en/Guide/MacOSX "Arduino Getting Started on MacOS"
 
 
+### Manual Installation
+  
+- Download [Arduino IDE][622f1188]  
+- Clone the source code into your computer.
+- Open Arduino IDE, import the zip as library. Please refer this [Import a .zip Library][8cd4af00]
+- Upload the example to your uArm
+ If you don't know how to upload Arduino sketch,  We recommend you read this [Arduino Getting Started on Windows][397d20eb] or [Arduino Getting Started on MacOS][2d8a8b7a]
+- You need to recalibrate when you are new to this library. we recommend the GUI Calibration tool.
+
+  [8cd4af00]: https://www.arduino.cc/en/Guide/Libraries#toc4 "Import a .zip Library"
+  [4b323740]: https://www.arduino.cc/en/Guide/Libraries#toc3 "Import Library Using Library Manager"
   [3]: http://developer.ufactory.cc/quickstart/arduino/
   [622f1188]: https://www.arduino.cc/en/Main/Software "Arduino IDE"
-  [8f51bc38]: https://www.arduino.cc/en/Guide/Libraries "Upload Guide"
+  [397d20eb]: https://www.arduino.cc/en/Guide/Windows "Arduino Getting Start on Windows"