* Remove breaking change description from README.
* Characteristic improvements (#73)
* Merged set_value and get_hap_value
* Small improvements
* Added helper method '_validate_value'
* Added helper method '_get_default_value'
* Raise ValueError if properties are invalid
* Added __slots__
* Additional changes
* New method: update_value (use for value updates from HAP-python)
* Rename: to_HAP to to_dict
* New method: from_dict (use during loading of chars)
* Addressed comments
* Fixed errors, small mistakes
* Added debug statements
* Changed '_LOGGER' to 'logger'
* Changed raise error to return None
* Raising ValueErrors with custom msg
* Bugfix, added additional logger.error statements
* Rearanged functions
* Added error_msg parameter
* Added tests
* Added '/htmlcov' to .gitignore
* Bump version number to 1.1.9