Improved and extended

New/added features

• SMBus.init(), SMBus.open(): bus can be a file path as well (issue #17).
• The folllowing SMBus commands added (last two normally not supported by pure i2c-devices):
  • process_call,
  • write_block_data,
  • read_block_data,
  • block_process_call.
• Enter/exit handlers moved to SMBus class.

• Expose enumerations of i2c functionality flags in the I2cFunc class and exported that.
• Added convenience features making the i2c_msg class easier to work with.

Deprecation warning

• The SMBusWrapper class is now considered deprecated. Please update your code to use SMBus instead.