Support for Joda Time

[Snowda]

Requesting support for the ability to pass DateTime() objects to getHistoricalWeather() as well as the default Date() object as until android implements Java 8, Joda is generally considered more reliable.

It would be nice to have Joda available in other places but this is a more difficult area to work around as it in in getHistoricalWeather()'s constructor.

See: http://stackoverflow.com/a/12034105/2441940

[riclage]

Please be very careful about adding JodaTime. It's a very heavy library that adds a whole host of other problems to your project. See here for more details. If you must go away from Java's standard classes and methods, consider this library instead.