name of "code" property changed to differentiate Serial Code from Family Code in the future
Added a new method to read entire scratchpad, which can be used to implement missing features (CRC, resolution, alarms etc.)
Added a new method to write data into scratchpad (only three bytes writable), which can be used to implement missing features (CRC, resolution, alarms etc.)
Added support for user programmable resolution (9-12 bits)
Merge pull request #12 from zigrin/ds18b20_res

User programmable resolution