Update TemperatureFormatter.java

Fix +0 temperature
Merge pull request #2 from Litemn/master

Update TemperatureFormatter.java
Merge branch 'master' of https://github.com/autoschool/weather into imperial

Conflicts:
	src/main/java/ru/yandex/autoschool/weather/models/Weather.java
	src/main/java/ru/yandex/autoschool/weather/utils/TemperatureFormatter.java
	src/test/java/ru/yandex/autoschool/weather/utils/TemperatureFormatterTest.java