Added

* Example how to change I2C address for SLF3x sensors

Changed
* Names of defines for I2C addresses in SensirionI2cSf06Lf.h changed
* Added prefix to enum definitions in SensirionI2cSf06Lf.h 
  (InvFlowScaleFactors -> I2cSf06LfInvFlowScaleFactors, CmdId -> I2cSf06LfCmdId)

Release 0.1.0