* Optimize I/O access
A single update() will now fetch information from all interesting modules,
including the current device state and the emeter information.
In practice, this will allow dropping the number of I/O reqs per homeassistant update cycle to 1,
which is paramount at least for bulbs which are very picky about sequential accesses.
This can be further extend to other modules/methods, if needed.
Currently fetched data:
* sysinfo
* realtime, today's and this months emeter stats
New properties:
* emeter_realtime: return the most recent emeter information, update()-version of get_emeter_realtime()
* emeter_today: returning today's energy consumption
* emeter_this_month: same for this month
Other changes:
* Accessing @requires_update properties will cause SmartDeviceException if the device has not ever been update()d
* Fix __repr__ for devices that haven't been updated
* Smartbulb uses now the state data from get_sysinfo instead of separately querying the bulb service
* SmartStrip's state_information no longer lists onsince for separate plugs
* The above mentioned properties are now printed out by cli
* Simplify is_on handling for bulbs
* remove implicit updates, return device responses for actions, update README.md instructions. fixes#61
* discover dimmers properly
* fix circular import, hopefully
* add is_color to SmartDevice API
* allow changing the dimming without implicitly turning the device on
* Add tests for device type handling for discovery data, make sure new fixtures are added to categories inside conftest
* Move dimmer support to its own class
SmartDimmer extends SmartPlug with brightness settings.
This will make the API of SmartPlug less confusing and will
make it simpler to downstream users to act with dimmers.
Fixes#33
* Lint & make tests pass
* Fix rebase after cache and emeter cleanups, hopefully everything went smoothly..
* oopsie, has_emeter was mistakenly included in smartplug
