Add a new JAXB based configuration system.
New interface which defines the functionality of an input.  All input
classes will be required to implement this interface.
Beginnings of an input class to generate random weather readings for
testing.  Still needs work to actually make it random and to fully
populate the weather reading.
Refactor to implement the WeatherStation interface.
Use the new Config class to read our configuration from an XML file.
Dynamically load the input and outputs defined in the configuration
file.