SBP 2 NMEA implementation

[mfine]

Converts SBP binary to NMEA GGA sentences. Sample run:

➜  ~  cat sample.sbp | sbp2nmea | head
$GPGGA,050309.800,3745.2354639,N,12228.4093110,W,4,15,0.0,112.43,M,0.0,M,,*41
$GPGGA,050309.900,3745.2354638,N,12228.4093110,W,4,15,0.0,112.43,M,0.0,M,,*41
$GPGGA,050310.000,3745.2354637,N,12228.4093111,W,4,15,0.0,112.43,M,0.0,M,,*4e
$GPGGA,050310.100,3745.2354637,N,12228.4093111,W,4,15,0.0,112.43,M,0.0,M,,*4f
$GPGGA,050310.200,3745.2354637,N,12228.4093111,W,4,15,0.0,112.43,M,0.0,M,,*4c
$GPGGA,050310.300,3745.2354637,N,12228.4093111,W,4,15,0.0,112.43,M,0.0,M,,*4d
$GPGGA,050310.400,3745.2354636,N,12228.4093110,W,4,15,0.0,112.43,M,0.0,M,,*4a
$GPGGA,050310.500,3745.2354637,N,12228.4093110,W,4,15,0.0,112.43,M,0.0,M,,*4a
$GPGGA,050310.600,3745.2354638,N,12228.4093110,W,4,15,0.0,112.43,M,0.0,M,,*46
$GPGGA,050310.700,3745.2354636,N,12228.4093109,W,4,15,0.0,112.43,M,0.0,M,,*41
➜  ~  

[mfine]

/cc @ericsenant