Added symbolic link workaround for teensy

Author: jantje

Eclipse update site/WebContent/fragments/how_to/work_with_teensy.md

@@ -10,6 +10,14 @@ Teensyduino 1.27 needs some modifications before you can use it.
 It is expected that TeensyDuino 1.28 will work without modifications.  
 To get this to work add [teensyduino]/hardware/teensy to the additional hardware paths.  
 
+Due to a bug in eclipse The file open dialogs on Mac don't let you access the package contents as you can do in Finder ([please vote for his bug](https://bugs.eclipse.org/bugs/show_bug.cgi?id=487534)).  
+The work around is is a 2 step activity.  
+   1) In the finder: Alt-Cmd-Drag the folder [teensyduino]/hardware/teensy out of the .app package into a normal, accessible folder on your disk. This will create a symbolic link that is accessible also via the folder chooser dialogs.  
+   2) Add the symbolic link to the hardware paths.  
+
+You can delete the symbolic link folder after adding the folder to the hardware path.
+   
+
 **Users of the Arduino eclipse plugin version 2.4 **  
 The arduino eclipse plugin support teensyduino 1.21 (and later) like arduino IDE.
 So basically there is no longer a difference between using teensyduino and Arduino IDE.