Extract the ZIP and copy ProperWeather.jar to plugins/ and en.txt to plugins/ProperWeather

• Added compatibility with Multi-Verse
• Added localisation API
• Added Item Rain weather
• Added API for WeatherElements (which will be documented after release, because it may change)

• If you define a weather and then undefine it somehow, you can get into trouble
• Configuring unexisting file with localisation results into FileNotFoundException

PLEASE REPORT IF ANY OTHER