fixed typo: levelling -> leveling.  Clarified how to get the library in place.
fixed typo: levelling -> leveling.  Clarified how to get the library in place.

m-mcgowan/spark-flashee-eeprom,m-mcgowan/spark-flashee-eeprom,m-mcgowan/spark-flashee-eeprom,m-mcgowan/spark-flashee-eeprom