Add version.{h,cpp}: Returning version info

version.cpp

@@ -0,0 +1,11 @@
+#include "version.h"
+
+std::string git_commit_id()
+{
+	return std::string(GITCOMMIT);
+}
+
+std::string get_version_string()
+{
+	return git_commit_id() + " Built: " + __DATE__ + " " + __TIME__;
+}