Add bottom status bar with git build info and compile time

Source/BuildInfo.h.in

@@ -0,0 +1,8 @@
+#pragma once
+// Generated at build time by cmake/GenerateBuildInfo.cmake. Do not edit manually.
+#define CHROMAFLOCK_GIT_HASH "@CHROMAFLOCK_GIT_HASH@"
+#define CHROMAFLOCK_GIT_BRANCH "@CHROMAFLOCK_GIT_BRANCH@"
+#define CHROMAFLOCK_GIT_DIRTY @CHROMAFLOCK_GIT_DIRTY@
+
+#include <string>
+std::string getBuildInfoString();