Added a version number to the source

Helios/Helios.cpp

@@ -38,6 +38,13 @@ bool Helios::keepgoing;
 bool Helios::sleeping;
 #endif
 
+#define HELIOS_VERSION 1.1.125
+#define HELIOS_VERSION_STR STR(HELIOS_VERSION)
+#define _STR(x) #x
+#define STR(x) _STR(x)
+
+volatile char helios_version[] = HELIOS_VERSION_STR;
+
 bool Helios::init()
 {
   // first initialize all the components of helios

Helios/HeliosConfig.h

@@ -1,6 +1,23 @@
 #ifndef HELIOS_CONFIG_H
 #define HELIOS_CONFIG_H
 
+// Helper macros to expand out the version into a string
+#define _STR(x) #x
+#define STR(x) _STR(x)
+
+// Helios Version Number
+//
+// It is expected that HELIOS_VERSION will be provided on the command line to the
+// compiler as a -DHELIOS_VERSION=a.b.c but if it's not it will default here
+#ifndef HELIOS_VERSION
+#define HELIOS_VERSION 0.0.1
+#endif
+
+// Helios Version String
+//
+// This is the string literal equivalent of HELIOS_VERSION above
+#define HELIOS_VERSION_STR    STR(HELIOS_VERSION)
+
 // Short Click Threshold
 //
 // The length of time in milliseconds for a click to