Fixes issue #33

Git bisect led me to 6509c83 as the offending commit.

The "CC3000 SpiWrite acquire bus" message and
the "CC3000 DmaHandler release read spi bus" message
do not break debug mode, but they create enough debug loggin
as to overwhelm the serial bus.

The "CC3000 DmaHandler release write spi bus" actually breaks
debug mode. Removed as unimportant.

SPARK_Firmware_Driver/src/cc3000_spi.c

@@ -331,7 +331,6 @@ long SpiWrite(unsigned char *ucBuf, unsigned short usLength)
             if(NotAborted)
             {
               NotAborted = Reserve(eSPI_STATE_WRITE_WAIT_IRQ);
-              WARN("CC3000 SpiWrite acquire bus");
               if(NotAborted)
               {
                   usLength = SpiSetUp(ucBuf, usLength);
@@ -405,7 +404,6 @@ void SPI_DMA_IntHandler(void)
 
                   SpiPauseSpi();
                   SetState(eSPI_STATE_IDLE, eDeAssert);
-                  WARN("CC3000 DmaHandler release read spi bus");
                   // Call out to the Unsolicited handler
                   // It will handle the event or leave it there for an outstanding opcode
                   // It it handles it the it Will resume the SPI ISR
@@ -434,7 +432,6 @@ void SPI_DMA_IntHandler(void)
                   else
                   {
                       SetState(eSPI_STATE_IDLE, eDeAssert);
-                      WARN("CC3000 DmaHandler release write spi bus");
                   }
           }
           break;