…y implemented i2c devices

…t is now set to 0xff as it should be.

…edefs corresponding to almost all real world eeprom devices. Removed the old eeprom24aa02uid class.

…in case one is found at this address

- completed documentation comments
- templated read and write methods such that only one version (8bit or 16bit) is available depending on the address mode of the instantiated device
- added name tag with eeprom capacity to the device name when identify() method is invoked

… documentation

…from i2c_device by low-level block reads/writes

… correct notation 'x' instead of "x"

…ning

…s time interval as double

…) which holds the possible device addresses of all classes derived from i2c_device

…vidual i2c devices

…o_extender class to derived PCA9536 and PCA9554 classes