Add command handling tests, resolve bugs

Jan Breuer

2015-04-14 781ef98e5441bf6aa12c50657bf2161953a79858

 examples/common/scpi-def.cpp

@@ -150,7 +150,6 @@
    /* control */ SCPI_Control,
    /* flush */ SCPI_Flush,
    /* reset */ SCPI_Reset,
    /* test */ SCPI_Test,
};

#define SCPI_INPUT_BUFFER_LENGTH 256