#1699 added who unit
#1699 added who unit

- added who unit
 : client can query with “?aqi=airkorea_who” when client needs WHO unit.

WizardFactory/TodayWeather,seankim2/TodayWeather,kimalec/TodayWeather,seankim2/TodayWeather,seankim2/TodayWeather,seankim2/TodayWeather,pokers/TodayWeather,skywlrl/TodayWeather,WizardFactory/TodayWeather,pokers/TodayWeather,pokers/TodayWeather,pokers/TodayWeather,skywlrl/TodayWeather,seankim2/TodayWeather,pokers/TodayWeather,kimalec/TodayWeather,WizardFactory/TodayWeather,kimalec/TodayWeather,seankim2/TodayWeather,kimalec/TodayWeather,skywlrl/TodayWeather,WizardFactory/TodayWeather,skywlrl/TodayWeather,WizardFactory/TodayWeather,kimalec/TodayWeather,skywlrl/TodayWeather