Smile: prepare for using the HA Core DataUpdateCoordintor in Plugwise-beta

All changes:

• Change the output to enable the full use of the HA Core DUC in plugwise-beta (using coordinator.data).
• Change state_class to total for interval- and net_cumulative sensors (following the HA Core sensor platform updates).
• Remove all remnant code related to last_reset (log_date)
• Restructure: introduce additional classes: SmileComm and SmileConnect

Fix P1 legacy location handling error

v0.14.2

Update CHANGELOG.md

Smile: sensor-platform updates - 2021.9 compatible

Merge pull request #99 from plugwise/last_reset

Squash last_resets and bump version

Smile: fully support legacy-type Smile P1 (specifically with firmware v2.1.13)

Merge pull request #96 from plugwise/Fix_p1v2_sensornames

Fix point-sensor-names for P1 v2

Energy support and bugfixes

• Stick: Add new properties energy_consumption_today counter and energy_consumption_today_last_reset timestamp. These properties
  can be used to properly measure the used energy. Very useful for the 'Energy' capabilities introduced in Home Assistant 2021.8.
• Stick: Synchronize clock of all plugwise devices once a day
• Stick: Reduced local clock drift from 30 to 5 seconds
• Stick: Optimized retrieval and handling of energy history
• Smile: add the required sensor attributes for Energy support
• Smile: add last_reset timestamps for interval-sensors and cumulative sensors
• Smile: fix the unit_of_measurement of electrical-cumulative-sensors (Wh --> kWh)

Fix new and remaining pylint warnings

Merge pull request #91 from plugwise/fix_act_dev_pr_init

Fix new/remaining pylint warnings

Code improvements

• Smile: improve use of protection for functions and parameter
• Fix pylint warnings and errors

Move functionality into backend, rearrange data in output

Rearrange data: the outputs of get_all_devices() and get_device_data() are combined into self.gw_devices. Binary_sensors, sensors and switches are included with all their attributes, in lists.
Two classes have been added (entities.py), one for master_thermostats and one for binary_sensors, these classes now handle the processing of data previously done in plugwise-beta (climate.py and binary_sensor.py).

Stick: bugfix, general: quality improvements.

Stick: quality improvements and fixing plugwise-beta bug #168
Smile: many quality-related improvements, no changes in functionality

Add lock-state switches

• Support for getting and setting the lock-state of Plugs-, Circles-, Stealth-switches. A set lock-state prevents a switch from being turned off.
• There is no lock_state available for the following special Plugwise classes: central heating pump and value actuator.