added i2cbus, stereo, rdspin and ledpin
added stereo to mmr70 structure
added new stereo command, added new configuration options
removed hardcoded values, now i2c can work with both i2c buses on RP1 rev2
minor fixes
initial checkin
stereo command added, removed hardcoded i2c bus number
stereo command added, removed hardcoded i2c bus number