Feature Request: Weather station implementation

[MartiMan79]

Hi Jens,

I just got a weather station and implementing it now with Sainlogic and Yahka to use in the EVE app. Works super!

Only rain (mm/h), UV index and wind direction are not available.

I found the UUID's compatible with EVE but my knowledge is far from enough to implement these into your code.

[https://github.com/naofireblade/homebridge-weather-plus/blob/master/util/characteristics.js]

Rain1h: '10c88f40-7ec4-478c-8d5a-bd0c3cce14b7',
UVIndex: '05ba0fe0-b848-4226-906d-5b64272e05ce',
WindDirection: '46f1284c-1912-421b-82f5-eb75008b167e'
SolarRadiation: '1819a23e-ecab-4d39-b29a-7364d299310b'

Thanks for taking this into consideration! Grtz, Martijn