Add ESP8266 support (#11)

Automatically disables random number functionality for ESP8266.

src/FixedPoints/Details.h

@@ -31,6 +31,10 @@
 #define FIXED_POINTS_DETAILS FixedPointsDetails
 #endif
 
+#if defined(ESP8266)
+#define FIXED_POINTS_NO_RANDOM
+#endif
+
 // Pay no attention to the man behind the curtains
 
 FIXED_POINTS_BEGIN_NAMESPACE
@@ -233,4 +237,4 @@ namespace FIXED_POINTS_DETAILS
 	//     ~Mwrow~       //
 	///////////////////////
 }
-FIXED_POINTS_END_NAMESPACE
+FIXED_POINTS_END_NAMESPACE