Fix order of deallocations, add heap unit test

Jan Breuer

2016-04-24 7d6b42c51111d450097af396af16a052e52a4442

 libscpi/inc/scpi/scpi.h

@@ -43,8 +43,8 @@
#include "scpi/constants.h"
#include "scpi/minimal.h"
#include "scpi/units.h"


#include "scpi/utils.h"
#include "scpi/expression.h"

#endif   /* SCPI_H */