Adding README to Libraries folder.

Author: Jim Lindblom

Libraries/README.md

@@ -0,0 +1,16 @@
+SparkFun LSM9DS1 Breakout Libraries
+=================================
+
+Libraries for use in different environments. 
+
+
+Directory Contents
+-------------------
+* **/Arduino** - [Arduino IDE](http://www.arduino.cc/en/Main/Software) libraries
+
+
+Update Library Instructions:
+----------------------------
+To get the most up-to-date version of the library, you must run the following git subtree commands. 
+
+$git subtree pull -P Libraries/<COMPILER NAME> --squash <product library repo URL> master