An upgraded 'Shared' macro allows a definition of the internal queue size on a per-object-basis.

This fixes #61.

Author: aentinger

src/Arduino_Threads.h

@@ -85,6 +85,9 @@ public: \
 #define SHARED(name, type) \
   Shared<type> name;
 
+#define SHARED(name, type, size) \
+  Shared<type, size> name;
+
 #define ARDUINO_THREADS_CONCAT_(x,y) x##y
 #define ARDUINO_THREADS_CONCAT(x,y) ARDUINO_THREADS_CONCAT_(x,y)