Added arduino libs

libraries/EnableInterrupt/examples/HiSpeed/README

@@ -0,0 +1,4 @@
+Note: This code has not been tested! Caveat Programmer. I will do it asap.
+(I have tested the HiSpeed code using the HiSpeedTest sketch, so I'm confident
+the library is working properly. Also this sketch compiles.).
+-GreyGnome