Update Compilation.md

Documentation/Compilation.md

   1. Install the latest non-beta arduino software IDE/toolset: http://www.arduino.cc/en/Main/Software
   2. Download the Marlin firmware
     - [Latest developement version](https://github.com/MarlinFirmware/Marlin/tree/Development)
-    - [Stable version](https://github.com/MarlinFirmware/Marlin/tree/Development)
+    - [Stable version]()
   3. In both cases use the "Download Zip" button on the right.
   4. Some boards require special files and/or libraries from the ArduinoAddons directory. Take a look at the dedicated [README](/ArduinoAddons/README.md) for details.
   5. Start the arduino IDE.
-  6. Select Tools -> Board -> Arduino Mega 2560    or your microcontroller
+  6. Select Tools -> Board -> Arduino Mega 2560 or your microcontroller
   7. Select the correct serial port in Tools ->Serial Port
   8. Open Marlin.pde or .ino
   9. Click the Verify/Compile button
   10. Click the Upload button. If all goes well the firmware is uploading
 
-That's ok.  Enjoy Silky Smooth Printing.
+That's ok.  Enjoy Silky Smooth Printing.